TDCroPower

@TDCroPower OMV release are tied to a specific Debian release OMV 5 is buster only, OMV6 bullseye. OMV 6 should be pretty stable, a rc is close to release. As for the upgrade from google I get
https://forum.openmediavault.org/index.php?thread/40927-omv-5-omv-6-upgrade/&postID=288759#post288759 and https://www.openmediavault.org/?p=3010
votdev:
OMV5 systems with version 5.6.18 or later can be upgraded via the command line tool omv-release-upgrade. Please note that this migration path has not yet been tested with many systems.
 
I cannot tell for certain but I believe  omv-release-upgrade also upgrades Debian from buster to bullseye.

I had a similar issue with random reboots. Did DM @axelroy directly and also "tweaked" the system.
 
I am running the helios now for almost 2 weeks without issues with the following settings:
Min CPU speed = 400 MHz
Max CPU speed = 1400 MHz
CPU governor = on demand
 
So it seems that the helios was rebooting when having to deal with intensive tasks - in my case: performing a SnapRAID scrub. Anyhow: Now I am at maximum speed of 1400MHz whereas the helios could perform even on 1800MHz. The question is if this is a problem by design? Or is there a way to fix it in order to let the machine run full CPU speed and performance governor? I am happy with the machine, no doubt, at the end this is rather a question of how I can achieve the maximum speed if needed.

It worked, I have my eMMC system back!
 
Here are all the steps in case someone else has the problem and wants to repair his eMMC image...
 
1. download a previous Helios64 image from here...
https://wiki.kobol.io/download/
2. install the image on a microSD e.g. for Windows and macOS there is Etcher...
https://www.balena.io/etcher/
3a. boot your Helios64 with the microSD and Jumper 10, see here...
https://wiki.kobol.io/helios64/troubleshoot/#how-to-force-boot-from-microsd
3b. Alternative: from the serial console press a key on the keyboard while u-boot start. You will get the u-boot prompt.
From this prompt write and press enter. Helios64 will boot from SD... (thx @prahal)
run bootcmd_mmc1  
4. if you are logged in as root user (normal users must put a sudo in front of the commands) execute the following commands...
root@helios64:~# mkdir -p /mnt/system root@helios64:~# mount /dev/mmcblk2p1 /mnt/system root@helios64:~# cd /mnt/system/
5. The contents of the /mnt/system directory should now be filled with the contents of your eMMC....
root@helios64:/mnt/system# ll total 80 lrwxrwxrwx 1 root root 7 Aug 30 2020 bin -> usr/bin drwxr-xr-x 3 root root 4096 Sep 1 03:01 boot drwxr-xr-x 2 root root 4096 Oct 15 2020 dev drwxr-xr-x 110 root root 12288 Sep 1 03:01 etc drwxr-xr-x 2 root root 4096 Sep 22 2020 export drwxr-xr-x 5 root root 4096 Jun 10 04:12 home lrwxrwxrwx 1 root root 7 Aug 30 2020 lib -> usr/lib drwx------ 5 root root 4096 Oct 5 2020 lost+found drwxr-xr-x 4 root root 4096 Oct 15 2020 media drwxr-xr-x 2 root root 4096 Feb 9 2021 mnt drwxr-xr-x 4 root root 4096 Dec 2 2020 opt dr-xr-xr-x 2 root root 4096 Oct 15 2020 proc drwx------ 7 root root 4096 Aug 31 23:36 root drwxr-xr-x 2 root root 4096 Oct 15 2020 run lrwxrwxrwx 1 root root 8 Aug 30 2020 sbin -> usr/sbin drwxrwxr-x 2 root root 4096 Oct 5 2020 selinux drwxr-xr-x 6 root root 4096 Jun 10 03:18 srv dr-xr-xr-x 2 root root 4096 Oct 15 2020 sys lrwxrwxrwx 1 root root 42 Sep 1 03:01 thermal_zone0 -> /sys/devices/virtual/thermal/thermal_zone0 drwxrwxrwt 2 root root 4096 Oct 15 2020 tmp drwxr-xr-x 12 root root 4096 Nov 27 2020 usr drwxr-xr-x 14 root root 4096 Oct 6 2020 var  
6. now download the 3 old packages...
root@helios64:/mnt/system# wget http://armbian.hosthatch.com/apt/pool/main/l/linux-5.10.43-rockchip64/linux-dtb-current-rockchip64_21.05.4_arm64.deb root@helios64:/mnt/system# wget http://armbian.hosthatch.com/apt/pool/main/l/linux-5.10.43-rockchip64/linux-headers-current-rockchip64_21.05.4_arm64.deb root@helios64:/mnt/system# wget http://armbian.hosthatch.com/apt/pool/main/l/linux-5.10.43-rockchip64/linux-image-current-rockchip64_21.05.4_arm64.deb  
7. now changes the root directory...
root@helios64:/mnt/system# chroot /mnt/system root@helios64:/# pwd / root@helios64:/# ll total 50996 lrwxrwxrwx 1 root root 7 Aug 30 2020 bin -> usr/bin drwxr-xr-x 3 root root 4096 Sep 1 14:56 boot drwxr-xr-x 2 root root 4096 Sep 1 16:15 dev drwxr-xr-x 110 root root 12288 Sep 1 03:01 etc drwxr-xr-x 2 root root 4096 Sep 22 2020 export drwxr-xr-x 5 root root 4096 Jun 10 04:12 home lrwxrwxrwx 1 root root 7 Aug 30 2020 lib -> usr/lib -rw-r--r-- 1 root root 314304 Jul 8 19:32 linux-dtb-current-rockchip64_21.05.4_arm64.deb -rw-r--r-- 1 root root 11527696 Jul 8 19:32 linux-headers-current-rockchip64_21.05.4_arm64.deb -rw-r--r-- 1 root root 40290884 Jul 8 19:33 linux-image-current-rockchip64_21.05.4_arm64.deb drwx------ 5 root root 4096 Oct 5 2020 lost+found drwxr-xr-x 4 root root 4096 Oct 15 2020 media drwxr-xr-x 2 root root 4096 Feb 9 2021 mnt drwxr-xr-x 4 root root 4096 Dec 2 2020 opt dr-xr-xr-x 2 root root 4096 Oct 15 2020 proc drwx------ 7 root root 4096 Aug 31 23:36 root drwxr-xr-x 2 root root 4096 Oct 15 2020 run lrwxrwxrwx 1 root root 8 Aug 30 2020 sbin -> usr/sbin drwxrwxr-x 2 root root 4096 Oct 5 2020 selinux drwxr-xr-x 6 root root 4096 Jun 10 03:18 srv dr-xr-xr-x 2 root root 4096 Oct 15 2020 sys lrwxrwxrwx 1 root root 42 Sep 1 03:01 thermal_zone0 -> /sys/devices/virtual/thermal/thermal_zone0 drwxrwxrwt 2 root root 4096 Oct 15 2020 tmp drwxr-xr-x 12 root root 4096 Nov 27 2020 usr drwxr-xr-x 14 root root 4096 Oct 6 2020 var  
8. now installs the downloaded packages...
root@helios64:/# dpkg -i *.deb dpkg: warning: downgrading linux-dtb-current-rockchip64 from 21.08.1 to 21.05.4 (Reading database ... 62558 files and directories currently installed.) Preparing to unpack linux-dtb-current-rockchip64_21.05.4_arm64.deb ... Unpacking linux-dtb-current-rockchip64 (21.05.4) over (21.08.1) ... Selecting previously unselected package linux-headers-current-rockchip64. Preparing to unpack linux-headers-current-rockchip64_21.05.4_arm64.deb ... Unpacking linux-headers-current-rockchip64 (21.05.4) ... dpkg: warning: downgrading linux-image-current-rockchip64 from 21.08.1 to 21.05.4 Preparing to unpack linux-image-current-rockchip64_21.05.4_arm64.deb ... update-initramfs: Deleting /boot/initrd.img-5.10.60-rockchip64 Removing obsolete file uInitrd-5.10.60-rockchip64 stat: cannot stat '/proc/1/root/.': No such file or directory Unpacking linux-image-current-rockchip64 (21.05.4) over (21.08.1) ... Setting up linux-dtb-current-rockchip64 (21.05.4) ... Setting up linux-headers-current-rockchip64 (21.05.4) ... Compiling headers - please wait ... grep: /proc/cpuinfo: No such file or directory grep: /proc/cpuinfo: No such file or directory Setting up linux-image-current-rockchip64 (21.05.4) ... update-initramfs: Generating /boot/initrd.img-5.10.43-rockchip64 W: Couldn't identify type of root file system for fsck hook update-initramfs: Converting to u-boot format  
9. reset the root change with exit and restart your helios64 with reboot...
root@helios64:/# exit exit root@helios64:/mnt/system# reboot  
10. after a reboot you should now boot from the eMMC again...
root@192.168.180.5's password: _ _ _ _ __ _ _ | | | | ___| (_) ___ ___ / /_ | || | | |_| |/ _ \ | |/ _ \/ __| '_ \| || |_ | _ | __/ | | (_) \__ \ (_) |__ _| |_| |_|\___|_|_|\___/|___/\___/ |_| Welcome to Armbian 21.08.1 Buster with Linux 5.10.43-rockchip64 No end-user support: built from trunk System load: 74% Up time: 3 min Memory usage: 34% of 3.77G IP: 172.18.0.1 172.19.0.1 172.20.0.1 172.17.0.1 192.168.180.5 CPU temp: 66°C Usage of /: 87% of 15G [ 0 security updates available, 3 updates total: apt upgrade ] Last check: 2021-09-01 16:38 [ General system configuration (beta): armbian-config ] Last login: Wed Sep 1 16:26:23 2021 root@helios64:~# root@helios64:~# uname -a Linux helios64 5.10.43-rockchip64 #21.05.4 SMP PREEMPT Wed Jun 16 08:02:12 UTC 2021 aarch64 GNU/Linux root@helios64:~#  
11. if the eMMC was used you can see with mount...
root@helios64:~# mount | grep /dev/mmc /dev/mmcblk2p1 on / type ext4 (rw,noatime,nodiratime,errors=remount-ro,commit=600) /dev/mmcblk2p1 on /var/folder2ram/var/log type ext4 (rw,noatime,nodiratime,errors=remount-ro,commit=600) /dev/mmcblk2p1 on /var/folder2ram/var/tmp type ext4 (rw,noatime,nodiratime,errors=remount-ro,commit=600) /dev/mmcblk2p1 on /var/folder2ram/var/lib/openmediavault/rrd type ext4 (rw,noatime,nodiratime,errors=remount-ro,commit=600) /dev/mmcblk2p1 on /var/folder2ram/var/spool type ext4 (rw,noatime,nodiratime,errors=remount-ro,commit=600) /dev/mmcblk2p1 on /var/folder2ram/var/lib/rrdcached type ext4 (rw,noatime,nodiratime,errors=remount-ro,commit=600) /dev/mmcblk2p1 on /var/folder2ram/var/lib/monit type ext4 (rw,noatime,nodiratime,errors=remount-ro,commit=600) /dev/mmcblk2p1 on /var/folder2ram/var/cache/samba type ext4 (rw,noatime,nodiratime,errors=remount-ro,commit=600)  

It worked, I have my eMMC system back!
 
Here are all the steps in case someone else has the problem and wants to repair his eMMC image...
 
1. download a previous Helios64 image from here...
https://wiki.kobol.io/download/
2. install the image on a microSD e.g. for Windows and macOS there is Etcher...
https://www.balena.io/etcher/
3a. boot your Helios64 with the microSD and Jumper 10, see here...
https://wiki.kobol.io/helios64/troubleshoot/#how-to-force-boot-from-microsd
3b. Alternative: from the serial console press a key on the keyboard while u-boot start. You will get the u-boot prompt.
From this prompt write and press enter. Helios64 will boot from SD... (thx @prahal)
run bootcmd_mmc1  
4. if you are logged in as root user (normal users must put a sudo in front of the commands) execute the following commands...
root@helios64:~# mkdir -p /mnt/system root@helios64:~# mount /dev/mmcblk2p1 /mnt/system root@helios64:~# cd /mnt/system/
5. The contents of the /mnt/system directory should now be filled with the contents of your eMMC....
root@helios64:/mnt/system# ll total 80 lrwxrwxrwx 1 root root 7 Aug 30 2020 bin -> usr/bin drwxr-xr-x 3 root root 4096 Sep 1 03:01 boot drwxr-xr-x 2 root root 4096 Oct 15 2020 dev drwxr-xr-x 110 root root 12288 Sep 1 03:01 etc drwxr-xr-x 2 root root 4096 Sep 22 2020 export drwxr-xr-x 5 root root 4096 Jun 10 04:12 home lrwxrwxrwx 1 root root 7 Aug 30 2020 lib -> usr/lib drwx------ 5 root root 4096 Oct 5 2020 lost+found drwxr-xr-x 4 root root 4096 Oct 15 2020 media drwxr-xr-x 2 root root 4096 Feb 9 2021 mnt drwxr-xr-x 4 root root 4096 Dec 2 2020 opt dr-xr-xr-x 2 root root 4096 Oct 15 2020 proc drwx------ 7 root root 4096 Aug 31 23:36 root drwxr-xr-x 2 root root 4096 Oct 15 2020 run lrwxrwxrwx 1 root root 8 Aug 30 2020 sbin -> usr/sbin drwxrwxr-x 2 root root 4096 Oct 5 2020 selinux drwxr-xr-x 6 root root 4096 Jun 10 03:18 srv dr-xr-xr-x 2 root root 4096 Oct 15 2020 sys lrwxrwxrwx 1 root root 42 Sep 1 03:01 thermal_zone0 -> /sys/devices/virtual/thermal/thermal_zone0 drwxrwxrwt 2 root root 4096 Oct 15 2020 tmp drwxr-xr-x 12 root root 4096 Nov 27 2020 usr drwxr-xr-x 14 root root 4096 Oct 6 2020 var  
6. now download the 3 old packages...
root@helios64:/mnt/system# wget http://armbian.hosthatch.com/apt/pool/main/l/linux-5.10.43-rockchip64/linux-dtb-current-rockchip64_21.05.4_arm64.deb root@helios64:/mnt/system# wget http://armbian.hosthatch.com/apt/pool/main/l/linux-5.10.43-rockchip64/linux-headers-current-rockchip64_21.05.4_arm64.deb root@helios64:/mnt/system# wget http://armbian.hosthatch.com/apt/pool/main/l/linux-5.10.43-rockchip64/linux-image-current-rockchip64_21.05.4_arm64.deb  
7. now changes the root directory...
root@helios64:/mnt/system# chroot /mnt/system root@helios64:/# pwd / root@helios64:/# ll total 50996 lrwxrwxrwx 1 root root 7 Aug 30 2020 bin -> usr/bin drwxr-xr-x 3 root root 4096 Sep 1 14:56 boot drwxr-xr-x 2 root root 4096 Sep 1 16:15 dev drwxr-xr-x 110 root root 12288 Sep 1 03:01 etc drwxr-xr-x 2 root root 4096 Sep 22 2020 export drwxr-xr-x 5 root root 4096 Jun 10 04:12 home lrwxrwxrwx 1 root root 7 Aug 30 2020 lib -> usr/lib -rw-r--r-- 1 root root 314304 Jul 8 19:32 linux-dtb-current-rockchip64_21.05.4_arm64.deb -rw-r--r-- 1 root root 11527696 Jul 8 19:32 linux-headers-current-rockchip64_21.05.4_arm64.deb -rw-r--r-- 1 root root 40290884 Jul 8 19:33 linux-image-current-rockchip64_21.05.4_arm64.deb drwx------ 5 root root 4096 Oct 5 2020 lost+found drwxr-xr-x 4 root root 4096 Oct 15 2020 media drwxr-xr-x 2 root root 4096 Feb 9 2021 mnt drwxr-xr-x 4 root root 4096 Dec 2 2020 opt dr-xr-xr-x 2 root root 4096 Oct 15 2020 proc drwx------ 7 root root 4096 Aug 31 23:36 root drwxr-xr-x 2 root root 4096 Oct 15 2020 run lrwxrwxrwx 1 root root 8 Aug 30 2020 sbin -> usr/sbin drwxrwxr-x 2 root root 4096 Oct 5 2020 selinux drwxr-xr-x 6 root root 4096 Jun 10 03:18 srv dr-xr-xr-x 2 root root 4096 Oct 15 2020 sys lrwxrwxrwx 1 root root 42 Sep 1 03:01 thermal_zone0 -> /sys/devices/virtual/thermal/thermal_zone0 drwxrwxrwt 2 root root 4096 Oct 15 2020 tmp drwxr-xr-x 12 root root 4096 Nov 27 2020 usr drwxr-xr-x 14 root root 4096 Oct 6 2020 var  
8. now installs the downloaded packages...
root@helios64:/# dpkg -i *.deb dpkg: warning: downgrading linux-dtb-current-rockchip64 from 21.08.1 to 21.05.4 (Reading database ... 62558 files and directories currently installed.) Preparing to unpack linux-dtb-current-rockchip64_21.05.4_arm64.deb ... Unpacking linux-dtb-current-rockchip64 (21.05.4) over (21.08.1) ... Selecting previously unselected package linux-headers-current-rockchip64. Preparing to unpack linux-headers-current-rockchip64_21.05.4_arm64.deb ... Unpacking linux-headers-current-rockchip64 (21.05.4) ... dpkg: warning: downgrading linux-image-current-rockchip64 from 21.08.1 to 21.05.4 Preparing to unpack linux-image-current-rockchip64_21.05.4_arm64.deb ... update-initramfs: Deleting /boot/initrd.img-5.10.60-rockchip64 Removing obsolete file uInitrd-5.10.60-rockchip64 stat: cannot stat '/proc/1/root/.': No such file or directory Unpacking linux-image-current-rockchip64 (21.05.4) over (21.08.1) ... Setting up linux-dtb-current-rockchip64 (21.05.4) ... Setting up linux-headers-current-rockchip64 (21.05.4) ... Compiling headers - please wait ... grep: /proc/cpuinfo: No such file or directory grep: /proc/cpuinfo: No such file or directory Setting up linux-image-current-rockchip64 (21.05.4) ... update-initramfs: Generating /boot/initrd.img-5.10.43-rockchip64 W: Couldn't identify type of root file system for fsck hook update-initramfs: Converting to u-boot format  
9. reset the root change with exit and restart your helios64 with reboot...
root@helios64:/# exit exit root@helios64:/mnt/system# reboot  
10. after a reboot you should now boot from the eMMC again...
root@192.168.180.5's password: _ _ _ _ __ _ _ | | | | ___| (_) ___ ___ / /_ | || | | |_| |/ _ \ | |/ _ \/ __| '_ \| || |_ | _ | __/ | | (_) \__ \ (_) |__ _| |_| |_|\___|_|_|\___/|___/\___/ |_| Welcome to Armbian 21.08.1 Buster with Linux 5.10.43-rockchip64 No end-user support: built from trunk System load: 74% Up time: 3 min Memory usage: 34% of 3.77G IP: 172.18.0.1 172.19.0.1 172.20.0.1 172.17.0.1 192.168.180.5 CPU temp: 66°C Usage of /: 87% of 15G [ 0 security updates available, 3 updates total: apt upgrade ] Last check: 2021-09-01 16:38 [ General system configuration (beta): armbian-config ] Last login: Wed Sep 1 16:26:23 2021 root@helios64:~# root@helios64:~# uname -a Linux helios64 5.10.43-rockchip64 #21.05.4 SMP PREEMPT Wed Jun 16 08:02:12 UTC 2021 aarch64 GNU/Linux root@helios64:~#  
11. if the eMMC was used you can see with mount...
root@helios64:~# mount | grep /dev/mmc /dev/mmcblk2p1 on / type ext4 (rw,noatime,nodiratime,errors=remount-ro,commit=600) /dev/mmcblk2p1 on /var/folder2ram/var/log type ext4 (rw,noatime,nodiratime,errors=remount-ro,commit=600) /dev/mmcblk2p1 on /var/folder2ram/var/tmp type ext4 (rw,noatime,nodiratime,errors=remount-ro,commit=600) /dev/mmcblk2p1 on /var/folder2ram/var/lib/openmediavault/rrd type ext4 (rw,noatime,nodiratime,errors=remount-ro,commit=600) /dev/mmcblk2p1 on /var/folder2ram/var/spool type ext4 (rw,noatime,nodiratime,errors=remount-ro,commit=600) /dev/mmcblk2p1 on /var/folder2ram/var/lib/rrdcached type ext4 (rw,noatime,nodiratime,errors=remount-ro,commit=600) /dev/mmcblk2p1 on /var/folder2ram/var/lib/monit type ext4 (rw,noatime,nodiratime,errors=remount-ro,commit=600) /dev/mmcblk2p1 on /var/folder2ram/var/cache/samba type ext4 (rw,noatime,nodiratime,errors=remount-ro,commit=600)  

bisected eMMC breakage:
06653ebc0ad2e0b7d799cd71a5c2933ed2fb7a66 is the first bad commit
 
commit 06653ebc0ad2e0b7d799cd71a5c2933ed2fb7a66 Author: Dmitry Baryshkov <dmitry.baryshkov@linaro.org> Date: Thu May 20 01:12:23 2021 +0300 regulator: core: resolve supply for boot-on/always-on regulators commit 98e48cd9283dbac0e1445ee780889f10b3d1db6a upstream. For the boot-on/always-on regulators the set_machine_constrainst() is called before resolving rdev->supply. Thus the code would try to enable rdev before enabling supplying regulator. Enforce resolving supply regulator before enabling rdev. Fixes: aea6cb99703e ("regulator: resolve supply after creating regulator") Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org> Link: https://lore.kernel.org/r/20210519221224.2868496-1-dmitry.baryshkov@linaro.org Signed-off-by: Mark Brown <broonie@kernel.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> drivers/regulator/core.c | 6 ++++++ 1 file changed, 6 insertions(+)  
is https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/drivers/regulator/core.c?id=98e48cd9283dbac0e1445ee780889f10b3d1db6a
from thread https://lore.kernel.org/all/20210519221224.2868496-1-dmitry.baryshkov@linaro.org/
 
diff --git a/drivers/regulator/core.c b/drivers/regulator/core.c index 7b3de8b0b1ca..043b5f63b94a 100644 --- a/drivers/regulator/core.c +++ b/drivers/regulator/core.c @@ -1422,6 +1422,12 @@ static int set_machine_constraints(struct regulator_dev *rdev) * and we have control then make sure it is enabled. */ if (rdev->constraints->always_on || rdev->constraints->boot_on) { + /* If we want to enable this regulator, make sure that we know + * the supplying regulator. + */ + if (rdev->supply_name && !rdev->supply) + return -EPROBE_DEFER; + if (rdev->supply) { ret = regulator_enable(rdev->supply); if (ret < 0) {  
EDIT 1: this change to return EPROBE_DEFER if regulator has a supply name but no supply ready was intended to complete commit aea6cb99703e17019e025aa71643b4d3e0a24413 which  expects set_machine_constraints to return this eprobe_defer error to attempt to resolve the supply ( before attempting a second run of set_machine_constraints).
 
One still need to find out if aea6cb99703e17019e025aa71643b4d3e0a24413 fails to resolve the supply and thus does not make a second attempt to set_machine_constraints thus leaves the regulator disabled or else.
 
 
commit aea6cb99703e17019e025aa71643b4d3e0a24413 Author: Micha? Miros?aw <mirq-linux@rere.qmqm.pl> Date: Sat Sep 26 23:32:41 2020 +0200 regulator: resolve supply after creating regulator When creating a new regulator its supply cannot create the sysfs link because the device is not yet published. Remove early supply resolving since it will be done later anyway. This makes the following error disappear and the symlinks get created instead. DCDC_REG1: supplied by VSYS VSYS: could not add device link regulator.3 err -2 Note: It doesn't fix the problem for bypassed regulators, though. Fixes: 45389c47526d ("regulator: core: Add early supply resolution for regulators") Signed-off-by: Micha? Miros?aw <mirq-linux@rere.qmqm.pl> Link: https://lore.kernel.org/r/ba09e0a8617ffeeb25cb4affffe6f3149319cef8.1601155770.git.mirq-linux@rere.qmqm.pl Signed-off-by: Mark Brown <broonie@kernel.org> diff --git a/drivers/regulator/core.c b/drivers/regulator/core.c index ff8e99ca0306..9f704a6c4802 100644 --- a/drivers/regulator/core.c +++ b/drivers/regulator/core.c @@ -5280,15 +5280,20 @@ regulator_register(const struct regulator_desc *regulator_desc, else if (regulator_desc->supply_name) rdev->supply_name = regulator_desc->supply_name; - /* - * Attempt to resolve the regulator supply, if specified, - * but don't return an error if we fail because we will try - * to resolve it again later as more regulators are added. - */ - if (regulator_resolve_supply(rdev)) - rdev_dbg(rdev, "unable to resolve supply\n"); - ret = set_machine_constraints(rdev, constraints); + if (ret == -EPROBE_DEFER) { + /* Regulator might be in bypass mode and so needs its supply + * to set the constraints */ + /* FIXME: this currently triggers a chicken-and-egg problem + * when creating -SUPPLY symlink in sysfs to a regulator + * that is just being created */ + ret = regulator_resolve_supply(rdev); + if (!ret) + ret = set_machine_constraints(rdev, constraints); + else + rdev_dbg(rdev, "unable to resolve supply early: %pe\n", + ERR_PTR(ret)); + } if (ret < 0) goto wash;  
 
 
My logs for bad shows:
[ 1.257297] reg-fixed-voltage vcc1v8-sys-s0: Failed to register regulator: -517 [ 1.257446] reg-fixed-voltage vcc0v9-s3: Failed to register regulator: -517 [ 1.257588] reg-fixed-voltage avdd-0v9-s0: Failed to register regulator: -517 [ 1.257728] reg-fixed-voltage avdd-1v8-s0: Failed to register regulator: -517 [ 1.258114] reg-fixed-voltage pcie-power: Failed to register regulator: -517 [ 1.258312] reg-fixed-voltage vcc3v3-sys-s3: Failed to register regulator: -517 [ 1.258451] reg-fixed-voltage vcc3v0-sd: Failed to register regulator: -517 [ 1.258705] reg-fixed-voltage vcc5v0-usb: Failed to register regulator: -517 [ 1.261721] reg-fixed-voltage usblan-power: Failed to register regulator: -517 [ 2.158719] vdd_log: supplied by regulator-dummy [ 2.230749] rk808-regulator rk808-regulator: there is no dvs0 gpio [ 2.230781] rk808-regulator rk808-regulator: there is no dvs1 gpio [ 2.230792] rk808-regulator rk808-regulator: max buck steps per change: 4 [ 2.240854] rk808 0-001b: failed to register 12 regulator [ 2.249848] fan53555-regulator 0-0040: FAN53555 Option[8] Rev[1] Detected! [ 2.253127] fan53555-regulator 0-0041: FAN53555 Option[8] Rev[1] Detected! [ 2.423549] reg-fixed-voltage vcc1v8-sys-s0: Failed to register regulator: -517 [ 2.424263] reg-fixed-voltage vcc0v9-s3: Failed to register regulator: -517 [ 2.424830] reg-fixed-voltage avdd-0v9-s0: Failed to register regulator: -517 [ 2.425443] reg-fixed-voltage avdd-1v8-s0: Failed to register regulator: -517 [ 2.556287] rk808-regulator rk808-regulator: there is no dvs0 gpio [ 2.556318] rk808-regulator rk808-regulator: there is no dvs1 gpio [ 2.556328] rk808-regulator rk808-regulator: max buck steps per change: 4  
while for good:
[ 2.172993] vdd_log: supplied by regulator-dummy [ 2.330040] rk808-regulator rk808-regulator: there is no dvs0 gpio [ 2.330071] rk808-regulator rk808-regulator: there is no dvs1 gpio [ 2.330081] rk808-regulator rk808-regulator: max buck steps per change: 4 [ 2.347345] fan53555-regulator 0-0040: FAN53555 Option[8] Rev[1] Detected! [ 2.350525] fan53555-regulator 0-0041: FAN53555 Option[8] Rev[1] Detected!

@piter75 commited the emmc fix into Armbian and built Armbian 21.08.2 which is already available through the Armbian mirrors (via 'apt update && apt upgrade').
 
It is save to upgrade your Buster or Bullseye installation to Armbian 21.08.2 - but emmc read speed will be about 50% what it used to be.
 
You can roll back to the previous linux 5.10.43 kernel if you don't like that - just install those files with 'dpkg -i *.deb'.
 

It worked, I have my eMMC system back!
 
Here are all the steps in case someone else has the problem and wants to repair his eMMC image...
 
1. download a previous Helios64 image from here...
https://wiki.kobol.io/download/
2. install the image on a microSD e.g. for Windows and macOS there is Etcher...
https://www.balena.io/etcher/
3a. boot your Helios64 with the microSD and Jumper 10, see here...
https://wiki.kobol.io/helios64/troubleshoot/#how-to-force-boot-from-microsd
3b. Alternative: from the serial console press a key on the keyboard while u-boot start. You will get the u-boot prompt.
From this prompt write and press enter. Helios64 will boot from SD... (thx @prahal)
run bootcmd_mmc1  
4. if you are logged in as root user (normal users must put a sudo in front of the commands) execute the following commands...
root@helios64:~# mkdir -p /mnt/system root@helios64:~# mount /dev/mmcblk2p1 /mnt/system root@helios64:~# cd /mnt/system/
5. The contents of the /mnt/system directory should now be filled with the contents of your eMMC....
root@helios64:/mnt/system# ll total 80 lrwxrwxrwx 1 root root 7 Aug 30 2020 bin -> usr/bin drwxr-xr-x 3 root root 4096 Sep 1 03:01 boot drwxr-xr-x 2 root root 4096 Oct 15 2020 dev drwxr-xr-x 110 root root 12288 Sep 1 03:01 etc drwxr-xr-x 2 root root 4096 Sep 22 2020 export drwxr-xr-x 5 root root 4096 Jun 10 04:12 home lrwxrwxrwx 1 root root 7 Aug 30 2020 lib -> usr/lib drwx------ 5 root root 4096 Oct 5 2020 lost+found drwxr-xr-x 4 root root 4096 Oct 15 2020 media drwxr-xr-x 2 root root 4096 Feb 9 2021 mnt drwxr-xr-x 4 root root 4096 Dec 2 2020 opt dr-xr-xr-x 2 root root 4096 Oct 15 2020 proc drwx------ 7 root root 4096 Aug 31 23:36 root drwxr-xr-x 2 root root 4096 Oct 15 2020 run lrwxrwxrwx 1 root root 8 Aug 30 2020 sbin -> usr/sbin drwxrwxr-x 2 root root 4096 Oct 5 2020 selinux drwxr-xr-x 6 root root 4096 Jun 10 03:18 srv dr-xr-xr-x 2 root root 4096 Oct 15 2020 sys lrwxrwxrwx 1 root root 42 Sep 1 03:01 thermal_zone0 -> /sys/devices/virtual/thermal/thermal_zone0 drwxrwxrwt 2 root root 4096 Oct 15 2020 tmp drwxr-xr-x 12 root root 4096 Nov 27 2020 usr drwxr-xr-x 14 root root 4096 Oct 6 2020 var  
6. now download the 3 old packages...
root@helios64:/mnt/system# wget http://armbian.hosthatch.com/apt/pool/main/l/linux-5.10.43-rockchip64/linux-dtb-current-rockchip64_21.05.4_arm64.deb root@helios64:/mnt/system# wget http://armbian.hosthatch.com/apt/pool/main/l/linux-5.10.43-rockchip64/linux-headers-current-rockchip64_21.05.4_arm64.deb root@helios64:/mnt/system# wget http://armbian.hosthatch.com/apt/pool/main/l/linux-5.10.43-rockchip64/linux-image-current-rockchip64_21.05.4_arm64.deb  
7. now changes the root directory...
root@helios64:/mnt/system# chroot /mnt/system root@helios64:/# pwd / root@helios64:/# ll total 50996 lrwxrwxrwx 1 root root 7 Aug 30 2020 bin -> usr/bin drwxr-xr-x 3 root root 4096 Sep 1 14:56 boot drwxr-xr-x 2 root root 4096 Sep 1 16:15 dev drwxr-xr-x 110 root root 12288 Sep 1 03:01 etc drwxr-xr-x 2 root root 4096 Sep 22 2020 export drwxr-xr-x 5 root root 4096 Jun 10 04:12 home lrwxrwxrwx 1 root root 7 Aug 30 2020 lib -> usr/lib -rw-r--r-- 1 root root 314304 Jul 8 19:32 linux-dtb-current-rockchip64_21.05.4_arm64.deb -rw-r--r-- 1 root root 11527696 Jul 8 19:32 linux-headers-current-rockchip64_21.05.4_arm64.deb -rw-r--r-- 1 root root 40290884 Jul 8 19:33 linux-image-current-rockchip64_21.05.4_arm64.deb drwx------ 5 root root 4096 Oct 5 2020 lost+found drwxr-xr-x 4 root root 4096 Oct 15 2020 media drwxr-xr-x 2 root root 4096 Feb 9 2021 mnt drwxr-xr-x 4 root root 4096 Dec 2 2020 opt dr-xr-xr-x 2 root root 4096 Oct 15 2020 proc drwx------ 7 root root 4096 Aug 31 23:36 root drwxr-xr-x 2 root root 4096 Oct 15 2020 run lrwxrwxrwx 1 root root 8 Aug 30 2020 sbin -> usr/sbin drwxrwxr-x 2 root root 4096 Oct 5 2020 selinux drwxr-xr-x 6 root root 4096 Jun 10 03:18 srv dr-xr-xr-x 2 root root 4096 Oct 15 2020 sys lrwxrwxrwx 1 root root 42 Sep 1 03:01 thermal_zone0 -> /sys/devices/virtual/thermal/thermal_zone0 drwxrwxrwt 2 root root 4096 Oct 15 2020 tmp drwxr-xr-x 12 root root 4096 Nov 27 2020 usr drwxr-xr-x 14 root root 4096 Oct 6 2020 var  
8. now installs the downloaded packages...
root@helios64:/# dpkg -i *.deb dpkg: warning: downgrading linux-dtb-current-rockchip64 from 21.08.1 to 21.05.4 (Reading database ... 62558 files and directories currently installed.) Preparing to unpack linux-dtb-current-rockchip64_21.05.4_arm64.deb ... Unpacking linux-dtb-current-rockchip64 (21.05.4) over (21.08.1) ... Selecting previously unselected package linux-headers-current-rockchip64. Preparing to unpack linux-headers-current-rockchip64_21.05.4_arm64.deb ... Unpacking linux-headers-current-rockchip64 (21.05.4) ... dpkg: warning: downgrading linux-image-current-rockchip64 from 21.08.1 to 21.05.4 Preparing to unpack linux-image-current-rockchip64_21.05.4_arm64.deb ... update-initramfs: Deleting /boot/initrd.img-5.10.60-rockchip64 Removing obsolete file uInitrd-5.10.60-rockchip64 stat: cannot stat '/proc/1/root/.': No such file or directory Unpacking linux-image-current-rockchip64 (21.05.4) over (21.08.1) ... Setting up linux-dtb-current-rockchip64 (21.05.4) ... Setting up linux-headers-current-rockchip64 (21.05.4) ... Compiling headers - please wait ... grep: /proc/cpuinfo: No such file or directory grep: /proc/cpuinfo: No such file or directory Setting up linux-image-current-rockchip64 (21.05.4) ... update-initramfs: Generating /boot/initrd.img-5.10.43-rockchip64 W: Couldn't identify type of root file system for fsck hook update-initramfs: Converting to u-boot format  
9. reset the root change with exit and restart your helios64 with reboot...
root@helios64:/# exit exit root@helios64:/mnt/system# reboot  
10. after a reboot you should now boot from the eMMC again...
root@192.168.180.5's password: _ _ _ _ __ _ _ | | | | ___| (_) ___ ___ / /_ | || | | |_| |/ _ \ | |/ _ \/ __| '_ \| || |_ | _ | __/ | | (_) \__ \ (_) |__ _| |_| |_|\___|_|_|\___/|___/\___/ |_| Welcome to Armbian 21.08.1 Buster with Linux 5.10.43-rockchip64 No end-user support: built from trunk System load: 74% Up time: 3 min Memory usage: 34% of 3.77G IP: 172.18.0.1 172.19.0.1 172.20.0.1 172.17.0.1 192.168.180.5 CPU temp: 66°C Usage of /: 87% of 15G [ 0 security updates available, 3 updates total: apt upgrade ] Last check: 2021-09-01 16:38 [ General system configuration (beta): armbian-config ] Last login: Wed Sep 1 16:26:23 2021 root@helios64:~# root@helios64:~# uname -a Linux helios64 5.10.43-rockchip64 #21.05.4 SMP PREEMPT Wed Jun 16 08:02:12 UTC 2021 aarch64 GNU/Linux root@helios64:~#  
11. if the eMMC was used you can see with mount...
root@helios64:~# mount | grep /dev/mmc /dev/mmcblk2p1 on / type ext4 (rw,noatime,nodiratime,errors=remount-ro,commit=600) /dev/mmcblk2p1 on /var/folder2ram/var/log type ext4 (rw,noatime,nodiratime,errors=remount-ro,commit=600) /dev/mmcblk2p1 on /var/folder2ram/var/tmp type ext4 (rw,noatime,nodiratime,errors=remount-ro,commit=600) /dev/mmcblk2p1 on /var/folder2ram/var/lib/openmediavault/rrd type ext4 (rw,noatime,nodiratime,errors=remount-ro,commit=600) /dev/mmcblk2p1 on /var/folder2ram/var/spool type ext4 (rw,noatime,nodiratime,errors=remount-ro,commit=600) /dev/mmcblk2p1 on /var/folder2ram/var/lib/rrdcached type ext4 (rw,noatime,nodiratime,errors=remount-ro,commit=600) /dev/mmcblk2p1 on /var/folder2ram/var/lib/monit type ext4 (rw,noatime,nodiratime,errors=remount-ro,commit=600) /dev/mmcblk2p1 on /var/folder2ram/var/cache/samba type ext4 (rw,noatime,nodiratime,errors=remount-ro,commit=600)  

It worked, I have my eMMC system back!
 
Here are all the steps in case someone else has the problem and wants to repair his eMMC image...
 
1. download a previous Helios64 image from here...
https://wiki.kobol.io/download/
2. install the image on a microSD e.g. for Windows and macOS there is Etcher...
https://www.balena.io/etcher/
3a. boot your Helios64 with the microSD and Jumper 10, see here...
https://wiki.kobol.io/helios64/troubleshoot/#how-to-force-boot-from-microsd
3b. Alternative: from the serial console press a key on the keyboard while u-boot start. You will get the u-boot prompt.
From this prompt write and press enter. Helios64 will boot from SD... (thx @prahal)
run bootcmd_mmc1  
4. if you are logged in as root user (normal users must put a sudo in front of the commands) execute the following commands...
root@helios64:~# mkdir -p /mnt/system root@helios64:~# mount /dev/mmcblk2p1 /mnt/system root@helios64:~# cd /mnt/system/
5. The contents of the /mnt/system directory should now be filled with the contents of your eMMC....
root@helios64:/mnt/system# ll total 80 lrwxrwxrwx 1 root root 7 Aug 30 2020 bin -> usr/bin drwxr-xr-x 3 root root 4096 Sep 1 03:01 boot drwxr-xr-x 2 root root 4096 Oct 15 2020 dev drwxr-xr-x 110 root root 12288 Sep 1 03:01 etc drwxr-xr-x 2 root root 4096 Sep 22 2020 export drwxr-xr-x 5 root root 4096 Jun 10 04:12 home lrwxrwxrwx 1 root root 7 Aug 30 2020 lib -> usr/lib drwx------ 5 root root 4096 Oct 5 2020 lost+found drwxr-xr-x 4 root root 4096 Oct 15 2020 media drwxr-xr-x 2 root root 4096 Feb 9 2021 mnt drwxr-xr-x 4 root root 4096 Dec 2 2020 opt dr-xr-xr-x 2 root root 4096 Oct 15 2020 proc drwx------ 7 root root 4096 Aug 31 23:36 root drwxr-xr-x 2 root root 4096 Oct 15 2020 run lrwxrwxrwx 1 root root 8 Aug 30 2020 sbin -> usr/sbin drwxrwxr-x 2 root root 4096 Oct 5 2020 selinux drwxr-xr-x 6 root root 4096 Jun 10 03:18 srv dr-xr-xr-x 2 root root 4096 Oct 15 2020 sys lrwxrwxrwx 1 root root 42 Sep 1 03:01 thermal_zone0 -> /sys/devices/virtual/thermal/thermal_zone0 drwxrwxrwt 2 root root 4096 Oct 15 2020 tmp drwxr-xr-x 12 root root 4096 Nov 27 2020 usr drwxr-xr-x 14 root root 4096 Oct 6 2020 var  
6. now download the 3 old packages...
root@helios64:/mnt/system# wget http://armbian.hosthatch.com/apt/pool/main/l/linux-5.10.43-rockchip64/linux-dtb-current-rockchip64_21.05.4_arm64.deb root@helios64:/mnt/system# wget http://armbian.hosthatch.com/apt/pool/main/l/linux-5.10.43-rockchip64/linux-headers-current-rockchip64_21.05.4_arm64.deb root@helios64:/mnt/system# wget http://armbian.hosthatch.com/apt/pool/main/l/linux-5.10.43-rockchip64/linux-image-current-rockchip64_21.05.4_arm64.deb  
7. now changes the root directory...
root@helios64:/mnt/system# chroot /mnt/system root@helios64:/# pwd / root@helios64:/# ll total 50996 lrwxrwxrwx 1 root root 7 Aug 30 2020 bin -> usr/bin drwxr-xr-x 3 root root 4096 Sep 1 14:56 boot drwxr-xr-x 2 root root 4096 Sep 1 16:15 dev drwxr-xr-x 110 root root 12288 Sep 1 03:01 etc drwxr-xr-x 2 root root 4096 Sep 22 2020 export drwxr-xr-x 5 root root 4096 Jun 10 04:12 home lrwxrwxrwx 1 root root 7 Aug 30 2020 lib -> usr/lib -rw-r--r-- 1 root root 314304 Jul 8 19:32 linux-dtb-current-rockchip64_21.05.4_arm64.deb -rw-r--r-- 1 root root 11527696 Jul 8 19:32 linux-headers-current-rockchip64_21.05.4_arm64.deb -rw-r--r-- 1 root root 40290884 Jul 8 19:33 linux-image-current-rockchip64_21.05.4_arm64.deb drwx------ 5 root root 4096 Oct 5 2020 lost+found drwxr-xr-x 4 root root 4096 Oct 15 2020 media drwxr-xr-x 2 root root 4096 Feb 9 2021 mnt drwxr-xr-x 4 root root 4096 Dec 2 2020 opt dr-xr-xr-x 2 root root 4096 Oct 15 2020 proc drwx------ 7 root root 4096 Aug 31 23:36 root drwxr-xr-x 2 root root 4096 Oct 15 2020 run lrwxrwxrwx 1 root root 8 Aug 30 2020 sbin -> usr/sbin drwxrwxr-x 2 root root 4096 Oct 5 2020 selinux drwxr-xr-x 6 root root 4096 Jun 10 03:18 srv dr-xr-xr-x 2 root root 4096 Oct 15 2020 sys lrwxrwxrwx 1 root root 42 Sep 1 03:01 thermal_zone0 -> /sys/devices/virtual/thermal/thermal_zone0 drwxrwxrwt 2 root root 4096 Oct 15 2020 tmp drwxr-xr-x 12 root root 4096 Nov 27 2020 usr drwxr-xr-x 14 root root 4096 Oct 6 2020 var  
8. now installs the downloaded packages...
root@helios64:/# dpkg -i *.deb dpkg: warning: downgrading linux-dtb-current-rockchip64 from 21.08.1 to 21.05.4 (Reading database ... 62558 files and directories currently installed.) Preparing to unpack linux-dtb-current-rockchip64_21.05.4_arm64.deb ... Unpacking linux-dtb-current-rockchip64 (21.05.4) over (21.08.1) ... Selecting previously unselected package linux-headers-current-rockchip64. Preparing to unpack linux-headers-current-rockchip64_21.05.4_arm64.deb ... Unpacking linux-headers-current-rockchip64 (21.05.4) ... dpkg: warning: downgrading linux-image-current-rockchip64 from 21.08.1 to 21.05.4 Preparing to unpack linux-image-current-rockchip64_21.05.4_arm64.deb ... update-initramfs: Deleting /boot/initrd.img-5.10.60-rockchip64 Removing obsolete file uInitrd-5.10.60-rockchip64 stat: cannot stat '/proc/1/root/.': No such file or directory Unpacking linux-image-current-rockchip64 (21.05.4) over (21.08.1) ... Setting up linux-dtb-current-rockchip64 (21.05.4) ... Setting up linux-headers-current-rockchip64 (21.05.4) ... Compiling headers - please wait ... grep: /proc/cpuinfo: No such file or directory grep: /proc/cpuinfo: No such file or directory Setting up linux-image-current-rockchip64 (21.05.4) ... update-initramfs: Generating /boot/initrd.img-5.10.43-rockchip64 W: Couldn't identify type of root file system for fsck hook update-initramfs: Converting to u-boot format  
9. reset the root change with exit and restart your helios64 with reboot...
root@helios64:/# exit exit root@helios64:/mnt/system# reboot  
10. after a reboot you should now boot from the eMMC again...
root@192.168.180.5's password: _ _ _ _ __ _ _ | | | | ___| (_) ___ ___ / /_ | || | | |_| |/ _ \ | |/ _ \/ __| '_ \| || |_ | _ | __/ | | (_) \__ \ (_) |__ _| |_| |_|\___|_|_|\___/|___/\___/ |_| Welcome to Armbian 21.08.1 Buster with Linux 5.10.43-rockchip64 No end-user support: built from trunk System load: 74% Up time: 3 min Memory usage: 34% of 3.77G IP: 172.18.0.1 172.19.0.1 172.20.0.1 172.17.0.1 192.168.180.5 CPU temp: 66°C Usage of /: 87% of 15G [ 0 security updates available, 3 updates total: apt upgrade ] Last check: 2021-09-01 16:38 [ General system configuration (beta): armbian-config ] Last login: Wed Sep 1 16:26:23 2021 root@helios64:~# root@helios64:~# uname -a Linux helios64 5.10.43-rockchip64 #21.05.4 SMP PREEMPT Wed Jun 16 08:02:12 UTC 2021 aarch64 GNU/Linux root@helios64:~#  
11. if the eMMC was used you can see with mount...
root@helios64:~# mount | grep /dev/mmc /dev/mmcblk2p1 on / type ext4 (rw,noatime,nodiratime,errors=remount-ro,commit=600) /dev/mmcblk2p1 on /var/folder2ram/var/log type ext4 (rw,noatime,nodiratime,errors=remount-ro,commit=600) /dev/mmcblk2p1 on /var/folder2ram/var/tmp type ext4 (rw,noatime,nodiratime,errors=remount-ro,commit=600) /dev/mmcblk2p1 on /var/folder2ram/var/lib/openmediavault/rrd type ext4 (rw,noatime,nodiratime,errors=remount-ro,commit=600) /dev/mmcblk2p1 on /var/folder2ram/var/spool type ext4 (rw,noatime,nodiratime,errors=remount-ro,commit=600) /dev/mmcblk2p1 on /var/folder2ram/var/lib/rrdcached type ext4 (rw,noatime,nodiratime,errors=remount-ro,commit=600) /dev/mmcblk2p1 on /var/folder2ram/var/lib/monit type ext4 (rw,noatime,nodiratime,errors=remount-ro,commit=600) /dev/mmcblk2p1 on /var/folder2ram/var/cache/samba type ext4 (rw,noatime,nodiratime,errors=remount-ro,commit=600)  

It worked, I have my eMMC system back!
 
Here are all the steps in case someone else has the problem and wants to repair his eMMC image...
 
1. download a previous Helios64 image from here...
https://wiki.kobol.io/download/
2. install the image on a microSD e.g. for Windows and macOS there is Etcher...
https://www.balena.io/etcher/
3a. boot your Helios64 with the microSD and Jumper 10, see here...
https://wiki.kobol.io/helios64/troubleshoot/#how-to-force-boot-from-microsd
3b. Alternative: from the serial console press a key on the keyboard while u-boot start. You will get the u-boot prompt.
From this prompt write and press enter. Helios64 will boot from SD... (thx @prahal)
run bootcmd_mmc1  
4. if you are logged in as root user (normal users must put a sudo in front of the commands) execute the following commands...
root@helios64:~# mkdir -p /mnt/system root@helios64:~# mount /dev/mmcblk2p1 /mnt/system root@helios64:~# cd /mnt/system/
5. The contents of the /mnt/system directory should now be filled with the contents of your eMMC....
root@helios64:/mnt/system# ll total 80 lrwxrwxrwx 1 root root 7 Aug 30 2020 bin -> usr/bin drwxr-xr-x 3 root root 4096 Sep 1 03:01 boot drwxr-xr-x 2 root root 4096 Oct 15 2020 dev drwxr-xr-x 110 root root 12288 Sep 1 03:01 etc drwxr-xr-x 2 root root 4096 Sep 22 2020 export drwxr-xr-x 5 root root 4096 Jun 10 04:12 home lrwxrwxrwx 1 root root 7 Aug 30 2020 lib -> usr/lib drwx------ 5 root root 4096 Oct 5 2020 lost+found drwxr-xr-x 4 root root 4096 Oct 15 2020 media drwxr-xr-x 2 root root 4096 Feb 9 2021 mnt drwxr-xr-x 4 root root 4096 Dec 2 2020 opt dr-xr-xr-x 2 root root 4096 Oct 15 2020 proc drwx------ 7 root root 4096 Aug 31 23:36 root drwxr-xr-x 2 root root 4096 Oct 15 2020 run lrwxrwxrwx 1 root root 8 Aug 30 2020 sbin -> usr/sbin drwxrwxr-x 2 root root 4096 Oct 5 2020 selinux drwxr-xr-x 6 root root 4096 Jun 10 03:18 srv dr-xr-xr-x 2 root root 4096 Oct 15 2020 sys lrwxrwxrwx 1 root root 42 Sep 1 03:01 thermal_zone0 -> /sys/devices/virtual/thermal/thermal_zone0 drwxrwxrwt 2 root root 4096 Oct 15 2020 tmp drwxr-xr-x 12 root root 4096 Nov 27 2020 usr drwxr-xr-x 14 root root 4096 Oct 6 2020 var  
6. now download the 3 old packages...
root@helios64:/mnt/system# wget http://armbian.hosthatch.com/apt/pool/main/l/linux-5.10.43-rockchip64/linux-dtb-current-rockchip64_21.05.4_arm64.deb root@helios64:/mnt/system# wget http://armbian.hosthatch.com/apt/pool/main/l/linux-5.10.43-rockchip64/linux-headers-current-rockchip64_21.05.4_arm64.deb root@helios64:/mnt/system# wget http://armbian.hosthatch.com/apt/pool/main/l/linux-5.10.43-rockchip64/linux-image-current-rockchip64_21.05.4_arm64.deb  
7. now changes the root directory...
root@helios64:/mnt/system# chroot /mnt/system root@helios64:/# pwd / root@helios64:/# ll total 50996 lrwxrwxrwx 1 root root 7 Aug 30 2020 bin -> usr/bin drwxr-xr-x 3 root root 4096 Sep 1 14:56 boot drwxr-xr-x 2 root root 4096 Sep 1 16:15 dev drwxr-xr-x 110 root root 12288 Sep 1 03:01 etc drwxr-xr-x 2 root root 4096 Sep 22 2020 export drwxr-xr-x 5 root root 4096 Jun 10 04:12 home lrwxrwxrwx 1 root root 7 Aug 30 2020 lib -> usr/lib -rw-r--r-- 1 root root 314304 Jul 8 19:32 linux-dtb-current-rockchip64_21.05.4_arm64.deb -rw-r--r-- 1 root root 11527696 Jul 8 19:32 linux-headers-current-rockchip64_21.05.4_arm64.deb -rw-r--r-- 1 root root 40290884 Jul 8 19:33 linux-image-current-rockchip64_21.05.4_arm64.deb drwx------ 5 root root 4096 Oct 5 2020 lost+found drwxr-xr-x 4 root root 4096 Oct 15 2020 media drwxr-xr-x 2 root root 4096 Feb 9 2021 mnt drwxr-xr-x 4 root root 4096 Dec 2 2020 opt dr-xr-xr-x 2 root root 4096 Oct 15 2020 proc drwx------ 7 root root 4096 Aug 31 23:36 root drwxr-xr-x 2 root root 4096 Oct 15 2020 run lrwxrwxrwx 1 root root 8 Aug 30 2020 sbin -> usr/sbin drwxrwxr-x 2 root root 4096 Oct 5 2020 selinux drwxr-xr-x 6 root root 4096 Jun 10 03:18 srv dr-xr-xr-x 2 root root 4096 Oct 15 2020 sys lrwxrwxrwx 1 root root 42 Sep 1 03:01 thermal_zone0 -> /sys/devices/virtual/thermal/thermal_zone0 drwxrwxrwt 2 root root 4096 Oct 15 2020 tmp drwxr-xr-x 12 root root 4096 Nov 27 2020 usr drwxr-xr-x 14 root root 4096 Oct 6 2020 var  
8. now installs the downloaded packages...
root@helios64:/# dpkg -i *.deb dpkg: warning: downgrading linux-dtb-current-rockchip64 from 21.08.1 to 21.05.4 (Reading database ... 62558 files and directories currently installed.) Preparing to unpack linux-dtb-current-rockchip64_21.05.4_arm64.deb ... Unpacking linux-dtb-current-rockchip64 (21.05.4) over (21.08.1) ... Selecting previously unselected package linux-headers-current-rockchip64. Preparing to unpack linux-headers-current-rockchip64_21.05.4_arm64.deb ... Unpacking linux-headers-current-rockchip64 (21.05.4) ... dpkg: warning: downgrading linux-image-current-rockchip64 from 21.08.1 to 21.05.4 Preparing to unpack linux-image-current-rockchip64_21.05.4_arm64.deb ... update-initramfs: Deleting /boot/initrd.img-5.10.60-rockchip64 Removing obsolete file uInitrd-5.10.60-rockchip64 stat: cannot stat '/proc/1/root/.': No such file or directory Unpacking linux-image-current-rockchip64 (21.05.4) over (21.08.1) ... Setting up linux-dtb-current-rockchip64 (21.05.4) ... Setting up linux-headers-current-rockchip64 (21.05.4) ... Compiling headers - please wait ... grep: /proc/cpuinfo: No such file or directory grep: /proc/cpuinfo: No such file or directory Setting up linux-image-current-rockchip64 (21.05.4) ... update-initramfs: Generating /boot/initrd.img-5.10.43-rockchip64 W: Couldn't identify type of root file system for fsck hook update-initramfs: Converting to u-boot format  
9. reset the root change with exit and restart your helios64 with reboot...
root@helios64:/# exit exit root@helios64:/mnt/system# reboot  
10. after a reboot you should now boot from the eMMC again...
root@192.168.180.5's password: _ _ _ _ __ _ _ | | | | ___| (_) ___ ___ / /_ | || | | |_| |/ _ \ | |/ _ \/ __| '_ \| || |_ | _ | __/ | | (_) \__ \ (_) |__ _| |_| |_|\___|_|_|\___/|___/\___/ |_| Welcome to Armbian 21.08.1 Buster with Linux 5.10.43-rockchip64 No end-user support: built from trunk System load: 74% Up time: 3 min Memory usage: 34% of 3.77G IP: 172.18.0.1 172.19.0.1 172.20.0.1 172.17.0.1 192.168.180.5 CPU temp: 66°C Usage of /: 87% of 15G [ 0 security updates available, 3 updates total: apt upgrade ] Last check: 2021-09-01 16:38 [ General system configuration (beta): armbian-config ] Last login: Wed Sep 1 16:26:23 2021 root@helios64:~# root@helios64:~# uname -a Linux helios64 5.10.43-rockchip64 #21.05.4 SMP PREEMPT Wed Jun 16 08:02:12 UTC 2021 aarch64 GNU/Linux root@helios64:~#  
11. if the eMMC was used you can see with mount...
root@helios64:~# mount | grep /dev/mmc /dev/mmcblk2p1 on / type ext4 (rw,noatime,nodiratime,errors=remount-ro,commit=600) /dev/mmcblk2p1 on /var/folder2ram/var/log type ext4 (rw,noatime,nodiratime,errors=remount-ro,commit=600) /dev/mmcblk2p1 on /var/folder2ram/var/tmp type ext4 (rw,noatime,nodiratime,errors=remount-ro,commit=600) /dev/mmcblk2p1 on /var/folder2ram/var/lib/openmediavault/rrd type ext4 (rw,noatime,nodiratime,errors=remount-ro,commit=600) /dev/mmcblk2p1 on /var/folder2ram/var/spool type ext4 (rw,noatime,nodiratime,errors=remount-ro,commit=600) /dev/mmcblk2p1 on /var/folder2ram/var/lib/rrdcached type ext4 (rw,noatime,nodiratime,errors=remount-ro,commit=600) /dev/mmcblk2p1 on /var/folder2ram/var/lib/monit type ext4 (rw,noatime,nodiratime,errors=remount-ro,commit=600) /dev/mmcblk2p1 on /var/folder2ram/var/cache/samba type ext4 (rw,noatime,nodiratime,errors=remount-ro,commit=600)  

It worked, I have my eMMC system back!
 
Here are all the steps in case someone else has the problem and wants to repair his eMMC image...
 
1. download a previous Helios64 image from here...
https://wiki.kobol.io/download/
2. install the image on a microSD e.g. for Windows and macOS there is Etcher...
https://www.balena.io/etcher/
3a. boot your Helios64 with the microSD and Jumper 10, see here...
https://wiki.kobol.io/helios64/troubleshoot/#how-to-force-boot-from-microsd
3b. Alternative: from the serial console press a key on the keyboard while u-boot start. You will get the u-boot prompt.
From this prompt write and press enter. Helios64 will boot from SD... (thx @prahal)
run bootcmd_mmc1  
4. if you are logged in as root user (normal users must put a sudo in front of the commands) execute the following commands...
root@helios64:~# mkdir -p /mnt/system root@helios64:~# mount /dev/mmcblk2p1 /mnt/system root@helios64:~# cd /mnt/system/
5. The contents of the /mnt/system directory should now be filled with the contents of your eMMC....
root@helios64:/mnt/system# ll total 80 lrwxrwxrwx 1 root root 7 Aug 30 2020 bin -> usr/bin drwxr-xr-x 3 root root 4096 Sep 1 03:01 boot drwxr-xr-x 2 root root 4096 Oct 15 2020 dev drwxr-xr-x 110 root root 12288 Sep 1 03:01 etc drwxr-xr-x 2 root root 4096 Sep 22 2020 export drwxr-xr-x 5 root root 4096 Jun 10 04:12 home lrwxrwxrwx 1 root root 7 Aug 30 2020 lib -> usr/lib drwx------ 5 root root 4096 Oct 5 2020 lost+found drwxr-xr-x 4 root root 4096 Oct 15 2020 media drwxr-xr-x 2 root root 4096 Feb 9 2021 mnt drwxr-xr-x 4 root root 4096 Dec 2 2020 opt dr-xr-xr-x 2 root root 4096 Oct 15 2020 proc drwx------ 7 root root 4096 Aug 31 23:36 root drwxr-xr-x 2 root root 4096 Oct 15 2020 run lrwxrwxrwx 1 root root 8 Aug 30 2020 sbin -> usr/sbin drwxrwxr-x 2 root root 4096 Oct 5 2020 selinux drwxr-xr-x 6 root root 4096 Jun 10 03:18 srv dr-xr-xr-x 2 root root 4096 Oct 15 2020 sys lrwxrwxrwx 1 root root 42 Sep 1 03:01 thermal_zone0 -> /sys/devices/virtual/thermal/thermal_zone0 drwxrwxrwt 2 root root 4096 Oct 15 2020 tmp drwxr-xr-x 12 root root 4096 Nov 27 2020 usr drwxr-xr-x 14 root root 4096 Oct 6 2020 var  
6. now download the 3 old packages...
root@helios64:/mnt/system# wget http://armbian.hosthatch.com/apt/pool/main/l/linux-5.10.43-rockchip64/linux-dtb-current-rockchip64_21.05.4_arm64.deb root@helios64:/mnt/system# wget http://armbian.hosthatch.com/apt/pool/main/l/linux-5.10.43-rockchip64/linux-headers-current-rockchip64_21.05.4_arm64.deb root@helios64:/mnt/system# wget http://armbian.hosthatch.com/apt/pool/main/l/linux-5.10.43-rockchip64/linux-image-current-rockchip64_21.05.4_arm64.deb  
7. now changes the root directory...
root@helios64:/mnt/system# chroot /mnt/system root@helios64:/# pwd / root@helios64:/# ll total 50996 lrwxrwxrwx 1 root root 7 Aug 30 2020 bin -> usr/bin drwxr-xr-x 3 root root 4096 Sep 1 14:56 boot drwxr-xr-x 2 root root 4096 Sep 1 16:15 dev drwxr-xr-x 110 root root 12288 Sep 1 03:01 etc drwxr-xr-x 2 root root 4096 Sep 22 2020 export drwxr-xr-x 5 root root 4096 Jun 10 04:12 home lrwxrwxrwx 1 root root 7 Aug 30 2020 lib -> usr/lib -rw-r--r-- 1 root root 314304 Jul 8 19:32 linux-dtb-current-rockchip64_21.05.4_arm64.deb -rw-r--r-- 1 root root 11527696 Jul 8 19:32 linux-headers-current-rockchip64_21.05.4_arm64.deb -rw-r--r-- 1 root root 40290884 Jul 8 19:33 linux-image-current-rockchip64_21.05.4_arm64.deb drwx------ 5 root root 4096 Oct 5 2020 lost+found drwxr-xr-x 4 root root 4096 Oct 15 2020 media drwxr-xr-x 2 root root 4096 Feb 9 2021 mnt drwxr-xr-x 4 root root 4096 Dec 2 2020 opt dr-xr-xr-x 2 root root 4096 Oct 15 2020 proc drwx------ 7 root root 4096 Aug 31 23:36 root drwxr-xr-x 2 root root 4096 Oct 15 2020 run lrwxrwxrwx 1 root root 8 Aug 30 2020 sbin -> usr/sbin drwxrwxr-x 2 root root 4096 Oct 5 2020 selinux drwxr-xr-x 6 root root 4096 Jun 10 03:18 srv dr-xr-xr-x 2 root root 4096 Oct 15 2020 sys lrwxrwxrwx 1 root root 42 Sep 1 03:01 thermal_zone0 -> /sys/devices/virtual/thermal/thermal_zone0 drwxrwxrwt 2 root root 4096 Oct 15 2020 tmp drwxr-xr-x 12 root root 4096 Nov 27 2020 usr drwxr-xr-x 14 root root 4096 Oct 6 2020 var  
8. now installs the downloaded packages...
root@helios64:/# dpkg -i *.deb dpkg: warning: downgrading linux-dtb-current-rockchip64 from 21.08.1 to 21.05.4 (Reading database ... 62558 files and directories currently installed.) Preparing to unpack linux-dtb-current-rockchip64_21.05.4_arm64.deb ... Unpacking linux-dtb-current-rockchip64 (21.05.4) over (21.08.1) ... Selecting previously unselected package linux-headers-current-rockchip64. Preparing to unpack linux-headers-current-rockchip64_21.05.4_arm64.deb ... Unpacking linux-headers-current-rockchip64 (21.05.4) ... dpkg: warning: downgrading linux-image-current-rockchip64 from 21.08.1 to 21.05.4 Preparing to unpack linux-image-current-rockchip64_21.05.4_arm64.deb ... update-initramfs: Deleting /boot/initrd.img-5.10.60-rockchip64 Removing obsolete file uInitrd-5.10.60-rockchip64 stat: cannot stat '/proc/1/root/.': No such file or directory Unpacking linux-image-current-rockchip64 (21.05.4) over (21.08.1) ... Setting up linux-dtb-current-rockchip64 (21.05.4) ... Setting up linux-headers-current-rockchip64 (21.05.4) ... Compiling headers - please wait ... grep: /proc/cpuinfo: No such file or directory grep: /proc/cpuinfo: No such file or directory Setting up linux-image-current-rockchip64 (21.05.4) ... update-initramfs: Generating /boot/initrd.img-5.10.43-rockchip64 W: Couldn't identify type of root file system for fsck hook update-initramfs: Converting to u-boot format  
9. reset the root change with exit and restart your helios64 with reboot...
root@helios64:/# exit exit root@helios64:/mnt/system# reboot  
10. after a reboot you should now boot from the eMMC again...
root@192.168.180.5's password: _ _ _ _ __ _ _ | | | | ___| (_) ___ ___ / /_ | || | | |_| |/ _ \ | |/ _ \/ __| '_ \| || |_ | _ | __/ | | (_) \__ \ (_) |__ _| |_| |_|\___|_|_|\___/|___/\___/ |_| Welcome to Armbian 21.08.1 Buster with Linux 5.10.43-rockchip64 No end-user support: built from trunk System load: 74% Up time: 3 min Memory usage: 34% of 3.77G IP: 172.18.0.1 172.19.0.1 172.20.0.1 172.17.0.1 192.168.180.5 CPU temp: 66°C Usage of /: 87% of 15G [ 0 security updates available, 3 updates total: apt upgrade ] Last check: 2021-09-01 16:38 [ General system configuration (beta): armbian-config ] Last login: Wed Sep 1 16:26:23 2021 root@helios64:~# root@helios64:~# uname -a Linux helios64 5.10.43-rockchip64 #21.05.4 SMP PREEMPT Wed Jun 16 08:02:12 UTC 2021 aarch64 GNU/Linux root@helios64:~#  
11. if the eMMC was used you can see with mount...
root@helios64:~# mount | grep /dev/mmc /dev/mmcblk2p1 on / type ext4 (rw,noatime,nodiratime,errors=remount-ro,commit=600) /dev/mmcblk2p1 on /var/folder2ram/var/log type ext4 (rw,noatime,nodiratime,errors=remount-ro,commit=600) /dev/mmcblk2p1 on /var/folder2ram/var/tmp type ext4 (rw,noatime,nodiratime,errors=remount-ro,commit=600) /dev/mmcblk2p1 on /var/folder2ram/var/lib/openmediavault/rrd type ext4 (rw,noatime,nodiratime,errors=remount-ro,commit=600) /dev/mmcblk2p1 on /var/folder2ram/var/spool type ext4 (rw,noatime,nodiratime,errors=remount-ro,commit=600) /dev/mmcblk2p1 on /var/folder2ram/var/lib/rrdcached type ext4 (rw,noatime,nodiratime,errors=remount-ro,commit=600) /dev/mmcblk2p1 on /var/folder2ram/var/lib/monit type ext4 (rw,noatime,nodiratime,errors=remount-ro,commit=600) /dev/mmcblk2p1 on /var/folder2ram/var/cache/samba type ext4 (rw,noatime,nodiratime,errors=remount-ro,commit=600)  

It worked, I have my eMMC system back!
 
Here are all the steps in case someone else has the problem and wants to repair his eMMC image...
 
1. download a previous Helios64 image from here...
https://wiki.kobol.io/download/
2. install the image on a microSD e.g. for Windows and macOS there is Etcher...
https://www.balena.io/etcher/
3a. boot your Helios64 with the microSD and Jumper 10, see here...
https://wiki.kobol.io/helios64/troubleshoot/#how-to-force-boot-from-microsd
3b. Alternative: from the serial console press a key on the keyboard while u-boot start. You will get the u-boot prompt.
From this prompt write and press enter. Helios64 will boot from SD... (thx @prahal)
run bootcmd_mmc1  
4. if you are logged in as root user (normal users must put a sudo in front of the commands) execute the following commands...
root@helios64:~# mkdir -p /mnt/system root@helios64:~# mount /dev/mmcblk2p1 /mnt/system root@helios64:~# cd /mnt/system/
5. The contents of the /mnt/system directory should now be filled with the contents of your eMMC....
root@helios64:/mnt/system# ll total 80 lrwxrwxrwx 1 root root 7 Aug 30 2020 bin -> usr/bin drwxr-xr-x 3 root root 4096 Sep 1 03:01 boot drwxr-xr-x 2 root root 4096 Oct 15 2020 dev drwxr-xr-x 110 root root 12288 Sep 1 03:01 etc drwxr-xr-x 2 root root 4096 Sep 22 2020 export drwxr-xr-x 5 root root 4096 Jun 10 04:12 home lrwxrwxrwx 1 root root 7 Aug 30 2020 lib -> usr/lib drwx------ 5 root root 4096 Oct 5 2020 lost+found drwxr-xr-x 4 root root 4096 Oct 15 2020 media drwxr-xr-x 2 root root 4096 Feb 9 2021 mnt drwxr-xr-x 4 root root 4096 Dec 2 2020 opt dr-xr-xr-x 2 root root 4096 Oct 15 2020 proc drwx------ 7 root root 4096 Aug 31 23:36 root drwxr-xr-x 2 root root 4096 Oct 15 2020 run lrwxrwxrwx 1 root root 8 Aug 30 2020 sbin -> usr/sbin drwxrwxr-x 2 root root 4096 Oct 5 2020 selinux drwxr-xr-x 6 root root 4096 Jun 10 03:18 srv dr-xr-xr-x 2 root root 4096 Oct 15 2020 sys lrwxrwxrwx 1 root root 42 Sep 1 03:01 thermal_zone0 -> /sys/devices/virtual/thermal/thermal_zone0 drwxrwxrwt 2 root root 4096 Oct 15 2020 tmp drwxr-xr-x 12 root root 4096 Nov 27 2020 usr drwxr-xr-x 14 root root 4096 Oct 6 2020 var  
6. now download the 3 old packages...
root@helios64:/mnt/system# wget http://armbian.hosthatch.com/apt/pool/main/l/linux-5.10.43-rockchip64/linux-dtb-current-rockchip64_21.05.4_arm64.deb root@helios64:/mnt/system# wget http://armbian.hosthatch.com/apt/pool/main/l/linux-5.10.43-rockchip64/linux-headers-current-rockchip64_21.05.4_arm64.deb root@helios64:/mnt/system# wget http://armbian.hosthatch.com/apt/pool/main/l/linux-5.10.43-rockchip64/linux-image-current-rockchip64_21.05.4_arm64.deb  
7. now changes the root directory...
root@helios64:/mnt/system# chroot /mnt/system root@helios64:/# pwd / root@helios64:/# ll total 50996 lrwxrwxrwx 1 root root 7 Aug 30 2020 bin -> usr/bin drwxr-xr-x 3 root root 4096 Sep 1 14:56 boot drwxr-xr-x 2 root root 4096 Sep 1 16:15 dev drwxr-xr-x 110 root root 12288 Sep 1 03:01 etc drwxr-xr-x 2 root root 4096 Sep 22 2020 export drwxr-xr-x 5 root root 4096 Jun 10 04:12 home lrwxrwxrwx 1 root root 7 Aug 30 2020 lib -> usr/lib -rw-r--r-- 1 root root 314304 Jul 8 19:32 linux-dtb-current-rockchip64_21.05.4_arm64.deb -rw-r--r-- 1 root root 11527696 Jul 8 19:32 linux-headers-current-rockchip64_21.05.4_arm64.deb -rw-r--r-- 1 root root 40290884 Jul 8 19:33 linux-image-current-rockchip64_21.05.4_arm64.deb drwx------ 5 root root 4096 Oct 5 2020 lost+found drwxr-xr-x 4 root root 4096 Oct 15 2020 media drwxr-xr-x 2 root root 4096 Feb 9 2021 mnt drwxr-xr-x 4 root root 4096 Dec 2 2020 opt dr-xr-xr-x 2 root root 4096 Oct 15 2020 proc drwx------ 7 root root 4096 Aug 31 23:36 root drwxr-xr-x 2 root root 4096 Oct 15 2020 run lrwxrwxrwx 1 root root 8 Aug 30 2020 sbin -> usr/sbin drwxrwxr-x 2 root root 4096 Oct 5 2020 selinux drwxr-xr-x 6 root root 4096 Jun 10 03:18 srv dr-xr-xr-x 2 root root 4096 Oct 15 2020 sys lrwxrwxrwx 1 root root 42 Sep 1 03:01 thermal_zone0 -> /sys/devices/virtual/thermal/thermal_zone0 drwxrwxrwt 2 root root 4096 Oct 15 2020 tmp drwxr-xr-x 12 root root 4096 Nov 27 2020 usr drwxr-xr-x 14 root root 4096 Oct 6 2020 var  
8. now installs the downloaded packages...
root@helios64:/# dpkg -i *.deb dpkg: warning: downgrading linux-dtb-current-rockchip64 from 21.08.1 to 21.05.4 (Reading database ... 62558 files and directories currently installed.) Preparing to unpack linux-dtb-current-rockchip64_21.05.4_arm64.deb ... Unpacking linux-dtb-current-rockchip64 (21.05.4) over (21.08.1) ... Selecting previously unselected package linux-headers-current-rockchip64. Preparing to unpack linux-headers-current-rockchip64_21.05.4_arm64.deb ... Unpacking linux-headers-current-rockchip64 (21.05.4) ... dpkg: warning: downgrading linux-image-current-rockchip64 from 21.08.1 to 21.05.4 Preparing to unpack linux-image-current-rockchip64_21.05.4_arm64.deb ... update-initramfs: Deleting /boot/initrd.img-5.10.60-rockchip64 Removing obsolete file uInitrd-5.10.60-rockchip64 stat: cannot stat '/proc/1/root/.': No such file or directory Unpacking linux-image-current-rockchip64 (21.05.4) over (21.08.1) ... Setting up linux-dtb-current-rockchip64 (21.05.4) ... Setting up linux-headers-current-rockchip64 (21.05.4) ... Compiling headers - please wait ... grep: /proc/cpuinfo: No such file or directory grep: /proc/cpuinfo: No such file or directory Setting up linux-image-current-rockchip64 (21.05.4) ... update-initramfs: Generating /boot/initrd.img-5.10.43-rockchip64 W: Couldn't identify type of root file system for fsck hook update-initramfs: Converting to u-boot format  
9. reset the root change with exit and restart your helios64 with reboot...
root@helios64:/# exit exit root@helios64:/mnt/system# reboot  
10. after a reboot you should now boot from the eMMC again...
root@192.168.180.5's password: _ _ _ _ __ _ _ | | | | ___| (_) ___ ___ / /_ | || | | |_| |/ _ \ | |/ _ \/ __| '_ \| || |_ | _ | __/ | | (_) \__ \ (_) |__ _| |_| |_|\___|_|_|\___/|___/\___/ |_| Welcome to Armbian 21.08.1 Buster with Linux 5.10.43-rockchip64 No end-user support: built from trunk System load: 74% Up time: 3 min Memory usage: 34% of 3.77G IP: 172.18.0.1 172.19.0.1 172.20.0.1 172.17.0.1 192.168.180.5 CPU temp: 66°C Usage of /: 87% of 15G [ 0 security updates available, 3 updates total: apt upgrade ] Last check: 2021-09-01 16:38 [ General system configuration (beta): armbian-config ] Last login: Wed Sep 1 16:26:23 2021 root@helios64:~# root@helios64:~# uname -a Linux helios64 5.10.43-rockchip64 #21.05.4 SMP PREEMPT Wed Jun 16 08:02:12 UTC 2021 aarch64 GNU/Linux root@helios64:~#  
11. if the eMMC was used you can see with mount...
root@helios64:~# mount | grep /dev/mmc /dev/mmcblk2p1 on / type ext4 (rw,noatime,nodiratime,errors=remount-ro,commit=600) /dev/mmcblk2p1 on /var/folder2ram/var/log type ext4 (rw,noatime,nodiratime,errors=remount-ro,commit=600) /dev/mmcblk2p1 on /var/folder2ram/var/tmp type ext4 (rw,noatime,nodiratime,errors=remount-ro,commit=600) /dev/mmcblk2p1 on /var/folder2ram/var/lib/openmediavault/rrd type ext4 (rw,noatime,nodiratime,errors=remount-ro,commit=600) /dev/mmcblk2p1 on /var/folder2ram/var/spool type ext4 (rw,noatime,nodiratime,errors=remount-ro,commit=600) /dev/mmcblk2p1 on /var/folder2ram/var/lib/rrdcached type ext4 (rw,noatime,nodiratime,errors=remount-ro,commit=600) /dev/mmcblk2p1 on /var/folder2ram/var/lib/monit type ext4 (rw,noatime,nodiratime,errors=remount-ro,commit=600) /dev/mmcblk2p1 on /var/folder2ram/var/cache/samba type ext4 (rw,noatime,nodiratime,errors=remount-ro,commit=600)  

For step 3 there is a way out of tweaking Jumper 10 if you want to boot force boot on SD.
From the serial console press a key on the keyboard while u-boot start. You will get the u-boot prompt.
from this prompt write:
run bootcmd_mmc1 and press enter. Helios64 will boot from SD.
To force boot from eMMC instead of SD, do the opposite:
run bootcmd_mmc0  
This saved me from opening the box.

Armbian is an established Linux for single board computers that is used in enterprise, IOT micro services and various hobby deployments. Recent desktop improvements bring the platform on-par with key players in the Linux desktop arena while keeping the key advantage – you can easily build your own Linux distribution.
 
 
 
 
Armbian provides stable releases every three months. They are driven by CURRENT LTS kernel. Adventurers which likes rolling releases, can check EDGE releases which are using latest daily kernel builds with fresh packages from sid, hirsute or impish userland.
 
Armbian has powerful build system which can build a whole Linux distribution, an OS image or a kernel. Key advantages are simplicity, speed and excellent hardware support. Provides native or cross compilation.
 
This release is hard work of exceptional individuals who have contributed their time and expertise into this release. Many thanks to – in alphabetic order:

@balbes150 @AristoChen @belegdol @Werner@Heisath @iav @Igor @Icenowy @lanefu @jock @piter75@Rich Neese@rpardini@going @tkaiser @tparys @TonyMac32 @Azq2 @henkiejan1 @juanesf @psztoch, @redchenjs @Uglymotha

Special thanks to users and vendors @orangepi, @friendlyelec, @khadas and @olimex that understand the importance of our work and supports the project with donations of cash, hardware & expertise.

Enjoy!
 
Highlights
 
minimal, server or XFCE, Cinnamon and Budgie desktop fast and effective automated language selection on first run regular stable and daily beta & EDGE updates CLI is powered with ZSH or BASH added automated kernel upgrade on EDGE 5.13.y kernels added mainline based SPI boot support for Odroid HC4 added Qemu virtual Armbian builds added CSC images for Tinkerboard 2, Rockpi N10, added ZFS upgrade to v2.1 improved Github Actions CI and CDN network added Cinnamon and Budgie desktop enabled 3D support wherever its possible and works reasonble well added Khadas VIM1-3 & Edge boards, Avnet Microzed enabled VPU support for Rockchip added legacy kernel support for OrangepiZero2, Nvidia Jetson declare Ubuntu Hirsute and Debian Bullseye packages as stable added Ubuntu Impish and Debian Sid as beta build targets added KDE plasma DE as a beta build target
Details:
 
What’s Left
 
long term armbian-config refactoring upgrading Rockchip u-boot from 2010.y to latest resolving Allwinner boot troubles on last u-boot enable 3D on Meson G12 / SM1 infrastructure improvements: mirros, runners, publishing.  
Details:
 
Tough Decisions
 
Odroid C4/HC4 boot problem has to remain unresolved in CURRENT 5.10.y kernel since fixing it would break Khadas boards. Problem was properly solved in EDGE kernel. We had to disable 3D on latest Amlogic boards due to instability Leaving behind published Deepin, Enlightenment, Gnome, i3, KDE plasma, Mate, Xmonad desktop due to space constrains and lack of maintenance. These options are still available within the build tool.  
Known problems
 
XFCE desktop is missing package gvfs-backends and xarchiver bullseye doesn’t properly detect locales Helios64 eMMC IO errors with CURRENT kernel OrangepiZero2 EDGE kernel based image doesn’t boot. Will be fixed in bug fix release.  

If anyone has installed the update but *not* rebooted, it's a quick (temporary) fix:
 
sudo apt install linux-dtb-current-rockchip64=21.05.4 linux-headers-current-rockchip64=21.05.4 linux-image-current-rockchip64=21.05.4  

It worked, I have my eMMC system back!
 
Here are all the steps in case someone else has the problem and wants to repair his eMMC image...
 
1. download a previous Helios64 image from here...
https://wiki.kobol.io/download/
2. install the image on a microSD e.g. for Windows and macOS there is Etcher...
https://www.balena.io/etcher/
3a. boot your Helios64 with the microSD and Jumper 10, see here...
https://wiki.kobol.io/helios64/troubleshoot/#how-to-force-boot-from-microsd
3b. Alternative: from the serial console press a key on the keyboard while u-boot start. You will get the u-boot prompt.
From this prompt write and press enter. Helios64 will boot from SD... (thx @prahal)
run bootcmd_mmc1  
4. if you are logged in as root user (normal users must put a sudo in front of the commands) execute the following commands...
root@helios64:~# mkdir -p /mnt/system root@helios64:~# mount /dev/mmcblk2p1 /mnt/system root@helios64:~# cd /mnt/system/
5. The contents of the /mnt/system directory should now be filled with the contents of your eMMC....
root@helios64:/mnt/system# ll total 80 lrwxrwxrwx 1 root root 7 Aug 30 2020 bin -> usr/bin drwxr-xr-x 3 root root 4096 Sep 1 03:01 boot drwxr-xr-x 2 root root 4096 Oct 15 2020 dev drwxr-xr-x 110 root root 12288 Sep 1 03:01 etc drwxr-xr-x 2 root root 4096 Sep 22 2020 export drwxr-xr-x 5 root root 4096 Jun 10 04:12 home lrwxrwxrwx 1 root root 7 Aug 30 2020 lib -> usr/lib drwx------ 5 root root 4096 Oct 5 2020 lost+found drwxr-xr-x 4 root root 4096 Oct 15 2020 media drwxr-xr-x 2 root root 4096 Feb 9 2021 mnt drwxr-xr-x 4 root root 4096 Dec 2 2020 opt dr-xr-xr-x 2 root root 4096 Oct 15 2020 proc drwx------ 7 root root 4096 Aug 31 23:36 root drwxr-xr-x 2 root root 4096 Oct 15 2020 run lrwxrwxrwx 1 root root 8 Aug 30 2020 sbin -> usr/sbin drwxrwxr-x 2 root root 4096 Oct 5 2020 selinux drwxr-xr-x 6 root root 4096 Jun 10 03:18 srv dr-xr-xr-x 2 root root 4096 Oct 15 2020 sys lrwxrwxrwx 1 root root 42 Sep 1 03:01 thermal_zone0 -> /sys/devices/virtual/thermal/thermal_zone0 drwxrwxrwt 2 root root 4096 Oct 15 2020 tmp drwxr-xr-x 12 root root 4096 Nov 27 2020 usr drwxr-xr-x 14 root root 4096 Oct 6 2020 var  
6. now download the 3 old packages...
root@helios64:/mnt/system# wget http://armbian.hosthatch.com/apt/pool/main/l/linux-5.10.43-rockchip64/linux-dtb-current-rockchip64_21.05.4_arm64.deb root@helios64:/mnt/system# wget http://armbian.hosthatch.com/apt/pool/main/l/linux-5.10.43-rockchip64/linux-headers-current-rockchip64_21.05.4_arm64.deb root@helios64:/mnt/system# wget http://armbian.hosthatch.com/apt/pool/main/l/linux-5.10.43-rockchip64/linux-image-current-rockchip64_21.05.4_arm64.deb  
7. now changes the root directory...
root@helios64:/mnt/system# chroot /mnt/system root@helios64:/# pwd / root@helios64:/# ll total 50996 lrwxrwxrwx 1 root root 7 Aug 30 2020 bin -> usr/bin drwxr-xr-x 3 root root 4096 Sep 1 14:56 boot drwxr-xr-x 2 root root 4096 Sep 1 16:15 dev drwxr-xr-x 110 root root 12288 Sep 1 03:01 etc drwxr-xr-x 2 root root 4096 Sep 22 2020 export drwxr-xr-x 5 root root 4096 Jun 10 04:12 home lrwxrwxrwx 1 root root 7 Aug 30 2020 lib -> usr/lib -rw-r--r-- 1 root root 314304 Jul 8 19:32 linux-dtb-current-rockchip64_21.05.4_arm64.deb -rw-r--r-- 1 root root 11527696 Jul 8 19:32 linux-headers-current-rockchip64_21.05.4_arm64.deb -rw-r--r-- 1 root root 40290884 Jul 8 19:33 linux-image-current-rockchip64_21.05.4_arm64.deb drwx------ 5 root root 4096 Oct 5 2020 lost+found drwxr-xr-x 4 root root 4096 Oct 15 2020 media drwxr-xr-x 2 root root 4096 Feb 9 2021 mnt drwxr-xr-x 4 root root 4096 Dec 2 2020 opt dr-xr-xr-x 2 root root 4096 Oct 15 2020 proc drwx------ 7 root root 4096 Aug 31 23:36 root drwxr-xr-x 2 root root 4096 Oct 15 2020 run lrwxrwxrwx 1 root root 8 Aug 30 2020 sbin -> usr/sbin drwxrwxr-x 2 root root 4096 Oct 5 2020 selinux drwxr-xr-x 6 root root 4096 Jun 10 03:18 srv dr-xr-xr-x 2 root root 4096 Oct 15 2020 sys lrwxrwxrwx 1 root root 42 Sep 1 03:01 thermal_zone0 -> /sys/devices/virtual/thermal/thermal_zone0 drwxrwxrwt 2 root root 4096 Oct 15 2020 tmp drwxr-xr-x 12 root root 4096 Nov 27 2020 usr drwxr-xr-x 14 root root 4096 Oct 6 2020 var  
8. now installs the downloaded packages...
root@helios64:/# dpkg -i *.deb dpkg: warning: downgrading linux-dtb-current-rockchip64 from 21.08.1 to 21.05.4 (Reading database ... 62558 files and directories currently installed.) Preparing to unpack linux-dtb-current-rockchip64_21.05.4_arm64.deb ... Unpacking linux-dtb-current-rockchip64 (21.05.4) over (21.08.1) ... Selecting previously unselected package linux-headers-current-rockchip64. Preparing to unpack linux-headers-current-rockchip64_21.05.4_arm64.deb ... Unpacking linux-headers-current-rockchip64 (21.05.4) ... dpkg: warning: downgrading linux-image-current-rockchip64 from 21.08.1 to 21.05.4 Preparing to unpack linux-image-current-rockchip64_21.05.4_arm64.deb ... update-initramfs: Deleting /boot/initrd.img-5.10.60-rockchip64 Removing obsolete file uInitrd-5.10.60-rockchip64 stat: cannot stat '/proc/1/root/.': No such file or directory Unpacking linux-image-current-rockchip64 (21.05.4) over (21.08.1) ... Setting up linux-dtb-current-rockchip64 (21.05.4) ... Setting up linux-headers-current-rockchip64 (21.05.4) ... Compiling headers - please wait ... grep: /proc/cpuinfo: No such file or directory grep: /proc/cpuinfo: No such file or directory Setting up linux-image-current-rockchip64 (21.05.4) ... update-initramfs: Generating /boot/initrd.img-5.10.43-rockchip64 W: Couldn't identify type of root file system for fsck hook update-initramfs: Converting to u-boot format  
9. reset the root change with exit and restart your helios64 with reboot...
root@helios64:/# exit exit root@helios64:/mnt/system# reboot  
10. after a reboot you should now boot from the eMMC again...
root@192.168.180.5's password: _ _ _ _ __ _ _ | | | | ___| (_) ___ ___ / /_ | || | | |_| |/ _ \ | |/ _ \/ __| '_ \| || |_ | _ | __/ | | (_) \__ \ (_) |__ _| |_| |_|\___|_|_|\___/|___/\___/ |_| Welcome to Armbian 21.08.1 Buster with Linux 5.10.43-rockchip64 No end-user support: built from trunk System load: 74% Up time: 3 min Memory usage: 34% of 3.77G IP: 172.18.0.1 172.19.0.1 172.20.0.1 172.17.0.1 192.168.180.5 CPU temp: 66°C Usage of /: 87% of 15G [ 0 security updates available, 3 updates total: apt upgrade ] Last check: 2021-09-01 16:38 [ General system configuration (beta): armbian-config ] Last login: Wed Sep 1 16:26:23 2021 root@helios64:~# root@helios64:~# uname -a Linux helios64 5.10.43-rockchip64 #21.05.4 SMP PREEMPT Wed Jun 16 08:02:12 UTC 2021 aarch64 GNU/Linux root@helios64:~#  
11. if the eMMC was used you can see with mount...
root@helios64:~# mount | grep /dev/mmc /dev/mmcblk2p1 on / type ext4 (rw,noatime,nodiratime,errors=remount-ro,commit=600) /dev/mmcblk2p1 on /var/folder2ram/var/log type ext4 (rw,noatime,nodiratime,errors=remount-ro,commit=600) /dev/mmcblk2p1 on /var/folder2ram/var/tmp type ext4 (rw,noatime,nodiratime,errors=remount-ro,commit=600) /dev/mmcblk2p1 on /var/folder2ram/var/lib/openmediavault/rrd type ext4 (rw,noatime,nodiratime,errors=remount-ro,commit=600) /dev/mmcblk2p1 on /var/folder2ram/var/spool type ext4 (rw,noatime,nodiratime,errors=remount-ro,commit=600) /dev/mmcblk2p1 on /var/folder2ram/var/lib/rrdcached type ext4 (rw,noatime,nodiratime,errors=remount-ro,commit=600) /dev/mmcblk2p1 on /var/folder2ram/var/lib/monit type ext4 (rw,noatime,nodiratime,errors=remount-ro,commit=600) /dev/mmcblk2p1 on /var/folder2ram/var/cache/samba type ext4 (rw,noatime,nodiratime,errors=remount-ro,commit=600)  

eMMC troubles has been reported on other RK3399 boards such as Nanopi T4. Since we didn't do anything in this area I suspect someone pushed bad code upstream. Need analysis, while I don't see possibility to check and fix in the following weeks. 

This was already answered in this thread.
 
 

Thank you for the Rsync guide, I'm going to give this a try real quick, I had to modify the parameters since i had my usb SD card reader mounted as /media/USB, the rsync just finished. I'm going to shutdown, and pop the SD Card in and see what happens
 

The easiest way to downgrade linux on emmc now would be to copy those files to /mnt/system (root directory of your emmc) - and then change root with  'chroot /mnt/system' and install the packages with 'dpkg -i *.deb'   (while your active system is on SD).
 
You can leave the chrooted environment by typing 'exit'. emmc should now be bootable again. If not, you need to update the bootloader on emmc as described earlier in this thread.

I opted to just setup an SD Card with the latest, and redo my OMV install on it, since that's technically all I use it for at this time, I was able to get the old system booted with no problems by pushing re-pushing the bootloader but wasn't able to install the Deb files, and I am not that confident in my linux skill set, though i learned a few new tips and tricks during the troubleshooting! I'll repush to EMMC once issues have eventually been resolved, or i may downgrade the kernel and push, i'll see later.
 
Thank you @ebin-dev for your advice and assistance and thank you @TDCroPower for the RSync article!

ok i got a little further.
I wrote the armbian image 21.02.3 with 5.10.21-rockchip64 on a SD and triggered the boot from microSD via jumper 10...
https://wiki.kobol.io/helios64/troubleshoot/#how-to-force-boot-from-microsd
 
i am back on the box and was able to mount the emmc under /dev/mmcblk2p1...
 
root@helios64:~# ll /mnt/ total 0 root@helios64:~# mkdir -p /mnt/system root@helios64:~# mount /dev/mmcblk2p1 /mnt/system root@helios64:~# cd /mnt/system/ root@helios64:/mnt/system# ll total 80 lrwxrwxrwx 1 root root 7 Aug 30 2020 bin -> usr/bin drwxr-xr-x 3 root root 4096 Sep 1 03:01 boot drwxr-xr-x 2 root root 4096 Oct 15 2020 dev drwxr-xr-x 110 root root 12288 Sep 1 03:01 etc drwxr-xr-x 2 root root 4096 Sep 22 2020 export drwxr-xr-x 5 root root 4096 Jun 10 04:12 home lrwxrwxrwx 1 root root 7 Aug 30 2020 lib -> usr/lib drwx------ 5 root root 4096 Oct 5 2020 lost+found drwxr-xr-x 4 root root 4096 Oct 15 2020 media drwxr-xr-x 2 root root 4096 Feb 9 2021 mnt drwxr-xr-x 4 root root 4096 Dec 2 2020 opt dr-xr-xr-x 2 root root 4096 Oct 15 2020 proc drwx------ 7 root root 4096 Aug 31 23:36 root drwxr-xr-x 2 root root 4096 Oct 15 2020 run lrwxrwxrwx 1 root root 8 Aug 30 2020 sbin -> usr/sbin drwxrwxr-x 2 root root 4096 Oct 5 2020 selinux drwxr-xr-x 6 root root 4096 Jun 10 03:18 srv dr-xr-xr-x 2 root root 4096 Oct 15 2020 sys lrwxrwxrwx 1 root root 42 Sep 1 03:01 thermal_zone0 -> /sys/devices/virtual/thermal/thermal_zone0 drwxrwxrwt 2 root root 4096 Oct 15 2020 tmp drwxr-xr-x 12 root root 4096 Nov 27 2020 usr drwxr-xr-x 14 root root 4096 Oct 6 2020 var root@helios64:/mnt/system#  
remains only the question how/where I install the packages that were described here...
https://forum.armbian.com/topic/18855-upgrading-to-bullseye/?tab=comments#comment-128189
 
maybe it has something to do with the boot/ directory....
root@helios64:/mnt/system# ll boot/ total 64696 -rw-r--r-- 1 root root 166 Sep 1 03:01 armbianEnv.txt -rw-r--r-- 1 root root 1536 Oct 15 2020 armbian_first_run.txt.template -rw-r--r-- 1 root root 38518 Oct 15 2020 boot.bmp -rw-r--r-- 1 root root 3113 Oct 15 2020 boot.cmd -rw-r--r-- 1 root root 3185 Oct 15 2020 boot.scr -rw-r--r-- 1 root root 221489 Aug 25 20:56 config-5.10.60-rockchip64 lrwxrwxrwx 1 root root 22 Sep 1 02:31 dtb -> dtb-5.10.60-rockchip64 drwxr-xr-x 6 root root 4096 Sep 1 02:30 dtb-5.10.60-rockchip64 lrwxrwxrwx 1 root root 26 Sep 1 02:31 Image -> vmlinuz-5.10.60-rockchip64 -rw-r--r-- 1 root root 15767106 Sep 1 02:32 initrd.img-5.10.60-rockchip64 -rw-r--r-- 1 root root 5839373 Aug 25 20:56 System.map-5.10.60-rockchip64 lrwxrwxrwx 1 root root 26 Sep 1 02:32 uInitrd -> uInitrd-5.10.60-rockchip64 -rw-r--r-- 1 root root 15767170 Sep 1 02:32 uInitrd-5.10.60-rockchip64 -rw-r--r-- 1 root root 28580352 Aug 25 20:56 vmlinuz-5.10.60-rockchip64 root@helios64:/mnt/system#  

I don't have a clean backup of the eMMC unfortunately, will probably have to introduce in the future to have a backup for such a step.
I found the following tutorial to clone the system from the emmc to a connected media....
https://averagelinuxuser.com/backup-and-restore-your-linux-system-with-rsync/
After that I would have to somehow downgrade my emmc backup on the media?
Does anyone have a tip which files have to be replaced?
After that I should clone from the fixed medium to a new SD and boot from it, now I should see my system again or?
And then in the armbian-config with...
System&security -> Install to -> system on emmc, boot from emmc
... to clone the image again on the emmc...
https://wiki.kobol.io/helios64/install/transfer/

Thanks to the Armbian team, we have now this forum club dedicated to Kobol products.
 
Feel free to create new topics to report issues, discuss features or share experience with Helios64.

We just added 2 new pages on our wiki :
 
Transfer Installed OS - How to transfer your OS install from microSD card to eMMC, USB or HDD/SSD.
Troubleshooting - Basic troubleshooting guide when starting with Helios64.

you can use the boot mode jumper to switch between eMMC (P10) and microSD (P11) boot, see the Helios wiki...
https://wiki.kobol.io/helios64/jumper/
 
 
@Helios Team...
what is the current image status?
Is it now possible to upgrade from 20.08.10 to the current version?
By now we are already at 20.08.22...
armbian-config/buster,buster 20.08.22 all [upgradable from: 20.08.10] armbian-firmware/buster,buster 20.08.22 all [upgradable from: 20.08.10] libfreetype6/stable,stable 2.9.1-3+deb10u2 arm64 [upgradable from: 2.9.1-3+deb10u1] libldap-2.4-2/stable,stable 2.4.47+dfsg-3+deb10u3 arm64 [upgradable from: 2.4.47+dfsg-3+deb10u2] libldap-common/stable,stable,stable,stable 2.4.47+dfsg-3+deb10u3 all [upgradable from: 2.4.47+dfsg-3+deb10u2] linux-buster-root-current-helios64/buster 20.08.21 arm64 [upgradable from: 20.08.10] linux-dtb-current-rockchip64/buster 20.08.21 arm64 [upgradable from: 20.08.10] linux-image-current-rockchip64/buster 20.08.21 arm64 [upgradable from: 20.08.10] linux-libc-dev/stable,stable 4.19.152-1 arm64 [upgradable from: 4.19.146-1] linux-u-boot-helios64-current/buster 20.08.21 arm64 [upgradable from: 20.08.10] openmediavault-omvextrasorg/buster,buster 5.4.2 all [upgradable from: 5.4.1] openmediavault/usul,usul,usul,usul 5.5.16-1 all [upgradable from: 5.5.12-1] salt-common/usul,usul,usul,usul 3002.1+ds-1 all [upgradable from: 3001.1+ds-1] salt-minion/usul,usul,usul,usul 3002.1+ds-1 all [upgradable from: 3001.1+ds-1] tzdata/stable-updates,stable-updates 2020d-0+deb10u1 all [upgradable from: 2020a-0+deb10u1]