saljut7

Thx @Igor. Here is my complete "how I fixed it log" because the "How to unbrick the system" didn't work for me completely because in my case uInitrd-4.9.7-sunxi and initrd.img-4.9.7-sunxi were not provided by the download links. Here is how I fixed my armbian kernel step by step (originally in markdown, sorry for some format issues). Hope it will help other users fixing a similar problem: ### Backup sd-card Create a backup with `dd`, example: # pv /dev/sdb | dd of=/home/YourUser/backups/YourServerHostname2017-05-08.img && sync ### Extract kernel DEBs to sd-card > Mount SD card and extract all those deb files to it’s mount point: dpkg -x linux-???.deb /media/...???.../mnt Example: root@YourRescueSystems:/path/to/your/downloaded/armbian_kernel_DEBs# ls -la total 25912 drwxr-xr-x 2 YourUser YourUser 4096 May 8 19:36 . drwxr-xr-x 5 YourUser YourUser 12288 May 8 18:16 .. -rw-r--r-- 1 YourUser YourUser 141466 May 8 19:35 linux-dtb-next-sunxi_5.25_armhf.deb -rw-r--r-- 1 YourUser YourUser 58860 May 8 19:35 linux-firmware-image-next-sunxi_5.25_armhf.deb -rw-r--r-- 1 YourUser YourUser 10267140 May 8 19:36 linux-headers-next-sunxi_5.25_armhf.deb -rw-r--r-- 1 YourUser YourUser 15415128 May 8 19:36 linux-image-next-sunxi_5.25_armhf.deb -rw-r--r-- 1 YourUser YourUser 362732 May 8 18:02 linux-jessie-root-next-cubietruck_5.25_armhf.deb -rw-r--r-- 1 YourUser YourUser 211868 May 8 17:56 linux-u-boot-next-cubietruck_5.25_armhf.deb root@YourRescueSystems:/path/to/your/downloaded/armbian_kernel_DEBs# dpkg -x linux-dtb-next-sunxi_5.25_armhf.deb /media/YourUser/SD-cardIDofYourBrokenArmbian/ root@YourRescueSystems:/path/to/your/downloaded/armbian_kernel_DEBs# dpkg -x linux-firmware-image-next-sunxi_5.25_armhf.deb /media/YourUser/SD-cardIDofYourBrokenArmbian/ root@YourRescueSystems:/path/to/your/downloaded/armbian_kernel_DEBs# dpkg -x linux-headers-next-sunxi_5.25_armhf.deb /media/YourUser/SD-cardIDofYourBrokenArmbian/ root@YourRescueSystems:/path/to/your/downloaded/armbian_kernel_DEBs# dpkg -x linux-image-next-sunxi_5.25_armhf.deb /media/YourUser/SD-cardIDofYourBrokenArmbian/ root@YourRescueSystems:/path/to/your/downloaded/armbian_kernel_DEBs# dpkg -x linux-jessie-root-next-cubietruck_5.25_armhf.deb /media/YourUser/SD-cardIDofYourBrokenArmbian/ root@YourRescueSystems:/path/to/your/downloaded/armbian_kernel_DEBs# dpkg -x linux-u-boot-next-cubietruck_5.25_armhf.deb /media/YourUser/SD-cardIDofYourBrokenArmbian/ ### Symlink vmlinuz-4.x.x-sunxi > Go to /mnt/boot and link (or copy) `vmlinuz-4.x.x-sunxi` kernel file to `zImage`: Example: root@YourRescueSystems:/path/to/your/downloaded/armbian_kernel_DEBs# cd /media/YourUser/SD-cardIDofYourBrokenArmbian/ root@YourRescueSystems:/media/YourUser/SD-cardIDofYourBrokenArmbian# cd boot/ root@YourRescueSystems:/media/YourUser/SD-cardIDofYourBrokenArmbian/boot# ls -la total 13100 drwxr-xr-x 6 root root 4096 Feb 2 03:20 . drwxr-xr-x 22 root root 4096 Feb 2 02:21 .. drwxr-xr-x 2 root root 4096 Feb 2 03:20 bin drwxr-xr-x 2 root root 4096 Oct 24 2016 bin.old -rwxr-xr-x 1 root root 6944 Sep 16 2015 boot.bmp -rwxr-xr-x 1 root root 1698 May 7 14:30 boot.cmd -rwxr-xr-x 1 root root 1749 May 7 14:30 boot.cmd.backup -rw-r--r-- 1 root root 1770 May 7 14:30 boot.scr -rw-r--r-- 1 root root 144620 Feb 2 01:53 config-4.9.7-sunxi lrwxrwxrwx 1 root root 17 Apr 30 14:30 dtb -> dtb-4.10.12-sunxi drwxr-xr-x 2 root root 4096 Sep 24 2016 dtb-4.6.3-sunxi drwxr-xr-x 2 root root 4096 Feb 2 01:53 dtb-4.9.7-sunxi lrwxrwxrwx 1 root root 16 Feb 25 01:06 dtb.old -> dtb-4.9.12-sunxi -rw-r--r-- 1 root root 0 Apr 30 14:31 .next lrwxrwxrwx 1 root root 24 Sep 16 2015 script.bin -> /boot/bin/cubietruck.bin -rw-r--r-- 1 root root 2695178 Feb 2 01:53 System.map-4.9.7-sunxi lrwxrwxrwx 1 root root 21 May 7 12:49 uInitrd -> uInitrd-4.10.12-sunxi -rw-r--r-- 1 root root 4484597 May 7 12:49 uInitrd-4.10.12-sunxi -rw-r--r-- 1 root root 0 Jan 1 1970 .verbose -rwxr-xr-x 1 root root 6037368 Feb 2 01:53 vmlinuz-4.9.7-sunxi lrwxrwxrwx 1 root root 21 Apr 30 14:31 zImage -> vmlinuz-4.10.12-sunxi root@YourRescueSystems:/media/YourUser/SD-cardIDofYourBrokenArmbian/boot# rm zImage root@YourRescueSystems:/media/YourUser/SD-cardIDofYourBrokenArmbian/boot# ln -s vmlinuz-4.9.7-sunxi zImage root@YourRescueSystems:/media/YourUser/SD-cardIDofYourBrokenArmbian/boot# ls -la total 13100 drwxr-xr-x 6 root root 4096 May 8 20:41 . drwxr-xr-x 22 root root 4096 Feb 2 02:21 .. drwxr-xr-x 2 root root 4096 Feb 2 03:20 bin drwxr-xr-x 2 root root 4096 Oct 24 2016 bin.old -rwxr-xr-x 1 root root 6944 Sep 16 2015 boot.bmp -rwxr-xr-x 1 root root 1698 May 7 14:30 boot.cmd -rwxr-xr-x 1 root root 1749 May 7 14:30 boot.cmd.backup -rw-r--r-- 1 root root 1770 May 7 14:30 boot.scr -rw-r--r-- 1 root root 144620 Feb 2 01:53 config-4.9.7-sunxi lrwxrwxrwx 1 root root 17 Apr 30 14:30 dtb -> dtb-4.10.12-sunxi drwxr-xr-x 2 root root 4096 Sep 24 2016 dtb-4.6.3-sunxi drwxr-xr-x 2 root root 4096 Feb 2 01:53 dtb-4.9.7-sunxi lrwxrwxrwx 1 root root 16 Feb 25 01:06 dtb.old -> dtb-4.9.12-sunxi -rw-r--r-- 1 root root 0 Apr 30 14:31 .next lrwxrwxrwx 1 root root 24 Sep 16 2015 script.bin -> /boot/bin/cubietruck.bin -rw-r--r-- 1 root root 2695178 Feb 2 01:53 System.map-4.9.7-sunxi lrwxrwxrwx 1 root root 21 May 7 12:49 uInitrd -> uInitrd-4.10.12-sunxi -rw-r--r-- 1 root root 4484597 May 7 12:49 uInitrd-4.10.12-sunxi -rw-r--r-- 1 root root 0 Jan 1 1970 .verbose -rwxr-xr-x 1 root root 6037368 Feb 2 01:53 vmlinuz-4.9.7-sunxi lrwxrwxrwx 1 root root 19 May 8 20:41 zImage -> vmlinuz-4.9.7-sunxi root@YourRescueSystems:/media/YourUser/SD-cardIDofYourBrokenArmbian/boot# ### Test your (maybe) unbricked system cd / umount /media/YourUser/SD-cardIDofYourBrokenArmbian Problem: armbian still doesn't boot. :/ #### Comparison FreshInstalledArmbian <-> BrokenArmbian root@YourRescueSystem:/media/YourUser/SD-cardIDofYourFreshInstalledArmbian/boot# ls -la total 16656 drwxr-xr-x 4 root root 4096 May 8 21:51 . drwxr-xr-x 22 root root 4096 Feb 5 22:54 .. -rw-r--r-- 1 root root 114 May 8 21:51 armbianEnv.txt drwxr-xr-x 2 root root 4096 Feb 5 22:58 bin -rw-r--r-- 1 root root 6944 Feb 5 22:59 boot.bmp -rw-r--r-- 1 root root 2580 Feb 5 22:53 boot.cmd -rw-r--r-- 1 root root 2652 Feb 5 23:00 boot.scr -rw-r--r-- 1 root root 144620 Feb 2 01:53 config-4.9.7-sunxi lrwxrwxrwx 1 root root 15 Feb 5 22:58 dtb -> dtb-4.9.7-sunxi drwxr-xr-x 2 root root 4096 Feb 5 22:58 dtb-4.9.7-sunxi -rw-r--r-- 1 root root 4065438 Feb 5 22:59 initrd.img-4.9.7-sunxi -rw-r--r-- 1 root root 0 Feb 5 22:54 .next lrwxrwxrwx 1 root root 18 Feb 5 22:58 script.bin -> bin/cubietruck.bin -rw-r--r-- 1 root root 2695178 Feb 2 01:53 System.map-4.9.7-sunxi lrwxrwxrwx 1 root root 19 Feb 5 22:59 uInitrd -> uInitrd-4.9.7-sunxi -rw-r--r-- 1 root root 4065502 Feb 5 22:59 uInitrd-4.9.7-sunxi -rwxr-xr-x 1 root root 6037368 Feb 2 01:53 vmlinuz-4.9.7-sunxi lrwxrwxrwx 1 root root 19 Feb 5 22:54 zImage -> vmlinuz-4.9.7-sunxi root@YourRescueSystems:/media/YourUser/SD-cardIDofYourBrokenArmbian/boot# ls -la total 13100 drwxr-xr-x 6 root root 4096 May 8 20:41 . drwxr-xr-x 22 root root 4096 Feb 2 02:21 .. drwxr-xr-x 2 root root 4096 Feb 2 03:20 bin drwxr-xr-x 2 root root 4096 Oct 24 2016 bin.old -rwxr-xr-x 1 root root 6944 Sep 16 2015 boot.bmp -rwxr-xr-x 1 root root 1698 May 7 14:30 boot.cmd -rwxr-xr-x 1 root root 1749 May 7 14:30 boot.cmd.backup -rw-r--r-- 1 root root 1770 May 7 14:30 boot.scr -rw-r--r-- 1 root root 144620 Feb 2 01:53 config-4.9.7-sunxi lrwxrwxrwx 1 root root 17 Apr 30 14:30 dtb -> dtb-4.10.12-sunxi drwxr-xr-x 2 root root 4096 Sep 24 2016 dtb-4.6.3-sunxi drwxr-xr-x 2 root root 4096 Feb 2 01:53 dtb-4.9.7-sunxi lrwxrwxrwx 1 root root 16 Feb 25 01:06 dtb.old -> dtb-4.9.12-sunxi -rw-r--r-- 1 root root 0 Apr 30 14:31 .next lrwxrwxrwx 1 root root 24 Sep 16 2015 script.bin -> /boot/bin/cubietruck.bin -rw-r--r-- 1 root root 2695178 Feb 2 01:53 System.map-4.9.7-sunxi lrwxrwxrwx 1 root root 21 May 7 12:49 uInitrd -> uInitrd-4.10.12-sunxi -rw-r--r-- 1 root root 4484597 May 7 12:49 uInitrd-4.10.12-sunxi -rw-r--r-- 1 root root 0 Jan 1 1970 .verbose -rwxr-xr-x 1 root root 6037368 Feb 2 01:53 vmlinuz-4.9.7-sunxi lrwxrwxrwx 1 root root 19 May 8 20:41 zImage -> vmlinuz-4.9.7-sunxi root@YourRescueSystems:/media/YourUser/SD-cardIDofYourBrokenArmbian/boot# So in my case some symlinks still point on ^4.10.*^ files: dtb -> dtb-4.10.12-sunxi (should point on ^dtb-4.9.7-sunxi^) uInitrd -> uInitrd-4.10.12-sunxi (should point on ^uInitrd-4.9.7-sunxi^ which is missing) And `initrd.img-4.9.7-sunxi` is missing. To get `uInitrd-4.9.7-sunxi` and `initrd.img-4.9.7-sunxi` I flashed `Armbian_5.25_Cubietruck_Debian_jessie_next_4.9.7.img` on another sd-card copied the missing files from `/media/YourUser/SD-cardIDofYourFreshInstalledArmbian/boot/uInitrd-4.9.7-sunxi` to `/media/YourUser/SD-cardIDofYourBrokenArmbian/boot/`. Then I fixed `dtb` and `uInitrd` symlinks in `/media/YourUser/SD-cardIDofYourBrokenArmbian/boot` and deleted all `4.10.12` files via: rm dtb rm uInitrd ln -s dtb-4.9.7-sunxi dtb ln -s uInitrd-4.9.7-sunxi uInitrd rm *4.10.12* Example: root@YourRescueSystem:/media/YourUser/SD-cardIDofYourBrokenArmbian/boot# ls -la total 17072 drwxr-xr-x 6 root root 4096 May 8 22:01 . drwxr-xr-x 22 root root 4096 Feb 2 02:21 .. drwxr-xr-x 2 root root 4096 Feb 2 03:20 bin drwxr-xr-x 2 root root 4096 Oct 24 2016 bin.old -rwxr-xr-x 1 root root 6944 Sep 16 2015 boot.bmp -rwxr-xr-x 1 root root 1698 May 7 14:30 boot.cmd -rwxr-xr-x 1 root root 1749 May 7 14:30 boot.cmd.backup -rw-r--r-- 1 root root 1770 May 7 14:30 boot.scr -rw-r--r-- 1 root root 144620 Feb 2 01:53 config-4.9.7-sunxi lrwxrwxrwx 1 root root 17 Apr 30 14:30 dtb -> dtb-4.10.12-sunxi drwxr-xr-x 2 root root 4096 Sep 24 2016 dtb-4.6.3-sunxi drwxr-xr-x 2 root root 4096 Feb 2 01:53 dtb-4.9.7-sunxi lrwxrwxrwx 1 root root 16 Feb 25 01:06 dtb.old -> dtb-4.9.12-sunxi -rw-r--r-- 1 root root 4065438 May 8 22:13 initrd.img-4.9.7-sunxi -rw-r--r-- 1 root root 0 Apr 30 14:31 .next lrwxrwxrwx 1 root root 24 Sep 16 2015 script.bin -> /boot/bin/cubietruck.bin -rw-r--r-- 1 root root 2695178 Feb 2 01:53 System.map-4.9.7-sunxi lrwxrwxrwx 1 root root 21 May 7 12:49 uInitrd -> uInitrd-4.10.12-sunxi -rw-r--r-- 1 root root 4484597 May 7 12:49 uInitrd-4.10.12-sunxi -rw-r--r-- 1 root root 4065502 May 8 22:01 uInitrd-4.9.7-sunxi -rw-r--r-- 1 root root 0 Jan 1 1970 .verbose -rwxr-xr-x 1 root root 6037368 Feb 2 01:53 vmlinuz-4.9.7-sunxi lrwxrwxrwx 1 root root 19 May 8 20:41 zImage -> vmlinuz-4.9.7-sunxi root@YourRescueSystem:/media/YourUser/SD-cardIDofYourBrokenArmbian/boot# rm dtb root@YourRescueSystem:/media/YourUser/SD-cardIDofYourBrokenArmbian/boot# rm uInitrd root@YourRescueSystem:/media/YourUser/SD-cardIDofYourBrokenArmbian/boot# ln -s dtb-4.9.7-sunxi dtb root@YourRescueSystem:/media/YourUser/SD-cardIDofYourBrokenArmbian/boot# ln -s uInitrd-4.9.7-sunxi uInitrd root@YourRescueSystem:/media/YourUser/SD-cardIDofYourBrokenArmbian/boot# rm *4.10.12* root@YourRescueSystem:/media/YourUser/SD-cardIDofYourBrokenArmbian/boot# ls -la total 16664 drwxr-xr-x 6 root root 4096 May 8 22:16 . drwxr-xr-x 22 root root 4096 Feb 2 02:21 .. drwxr-xr-x 2 root root 4096 Feb 2 03:20 bin drwxr-xr-x 2 root root 4096 Oct 24 2016 bin.old -rwxr-xr-x 1 root root 6944 Sep 16 2015 boot.bmp -rwxr-xr-x 1 root root 1698 May 7 14:30 boot.cmd -rwxr-xr-x 1 root root 1749 May 7 14:30 boot.cmd.backup -rw-r--r-- 1 root root 1770 May 7 14:30 boot.scr -rw-r--r-- 1 root root 144620 Feb 2 01:53 config-4.9.7-sunxi lrwxrwxrwx 1 root root 15 May 8 22:04 dtb -> dtb-4.9.7-sunxi drwxr-xr-x 2 root root 4096 Sep 24 2016 dtb-4.6.3-sunxi drwxr-xr-x 2 root root 4096 Feb 2 01:53 dtb-4.9.7-sunxi lrwxrwxrwx 1 root root 16 Feb 25 01:06 dtb.old -> dtb-4.9.12-sunxi -rw-r--r-- 1 root root 4065438 May 8 22:13 initrd.img-4.9.7-sunxi -rw-r--r-- 1 root root 0 Apr 30 14:31 .next lrwxrwxrwx 1 root root 24 Sep 16 2015 script.bin -> /boot/bin/cubietruck.bin -rw-r--r-- 1 root root 2695178 Feb 2 01:53 System.map-4.9.7-sunxi lrwxrwxrwx 1 root root 19 May 8 22:04 uInitrd -> uInitrd-4.9.7-sunxi -rw-r--r-- 1 root root 4065502 May 8 22:01 uInitrd-4.9.7-sunxi -rw-r--r-- 1 root root 0 Jan 1 1970 .verbose -rwxr-xr-x 1 root root 6037368 Feb 2 01:53 vmlinuz-4.9.7-sunxi lrwxrwxrwx 1 root root 19 May 8 20:41 zImage -> vmlinuz-4.9.7-sunxi root@YourRescueSystem:/media/YourUser/SD-cardIDofYourBrokenArmbian/boot# Comparison with FreshInstalledArmbian: root@YourRescueSystem:/media/YourUser/SD-cardIDofYourFreshInstalledArmbian/boot# ls -la total 16656 drwxr-xr-x 4 root root 4096 May 8 21:51 . drwxr-xr-x 22 root root 4096 Feb 5 22:54 .. -rw-r--r-- 1 root root 114 May 8 21:51 armbianEnv.txt drwxr-xr-x 2 root root 4096 Feb 5 22:58 bin -rw-r--r-- 1 root root 6944 Feb 5 22:59 boot.bmp -rw-r--r-- 1 root root 2580 Feb 5 22:53 boot.cmd -rw-r--r-- 1 root root 2652 Feb 5 23:00 boot.scr -rw-r--r-- 1 root root 144620 Feb 2 01:53 config-4.9.7-sunxi lrwxrwxrwx 1 root root 15 Feb 5 22:58 dtb -> dtb-4.9.7-sunxi drwxr-xr-x 2 root root 4096 Feb 5 22:58 dtb-4.9.7-sunxi -rw-r--r-- 1 root root 4065438 Feb 5 22:59 initrd.img-4.9.7-sunxi -rw-r--r-- 1 root root 0 Feb 5 22:54 .next lrwxrwxrwx 1 root root 18 Feb 5 22:58 script.bin -> bin/cubietruck.bin -rw-r--r-- 1 root root 2695178 Feb 2 01:53 System.map-4.9.7-sunxi lrwxrwxrwx 1 root root 19 Feb 5 22:59 uInitrd -> uInitrd-4.9.7-sunxi -rw-r--r-- 1 root root 4065502 Feb 5 22:59 uInitrd-4.9.7-sunxi -rwxr-xr-x 1 root root 6037368 Feb 2 01:53 vmlinuz-4.9.7-sunxi lrwxrwxrwx 1 root root 19 Feb 5 22:54 zImage -> vmlinuz-4.9.7-sunxi Magic moment... ...armbian is booting again.

Thx @zador.blood.stained and @Igor: is there a way to to get a working kernel back on my system? I mean: as long there is a prompt (sunxi# ?) there is hope, isn't it?

Hello together sorry for this long description but I want to provide all information I could save. I'm running armbian since 2(?) years and had never a serious problem with it. Today the system was not reachable anymore (services, ssh, ping) so I rebooted the server. Rebooting worked but all my data is on an external encrypted harddisk which I couldn't open anymore: root@MyCubietruck:~# cryptsetup luksOpen /dev/sda1 MyEncryptedHarddisk Enter passphrase for /dev/sda1: device-mapper: reload ioctl on failed: No such file or directory Failed to setup dm-crypt key mapping for device /dev/sda1. Check that kernel supports aes-xts-plain64 cipher (check syslog for more info). journalctl said: root@MyCubietruck:~# journalctl -r May 07 13:37:11 MyCubietruck kernel: device-mapper: ioctl: error adding target to table May 07 13:37:11 MyCubietruck kernel: device-mapper: table: 254:0: crypt: Error allocating crypto tfm System and kernel info when the armbian was still working was: root@MyCubietruck:~# uname -a Linux MyCubietruck 4.10.12-sunxi #7 SMP Wed Apr 26 02:44:12 CEST 2017 armv7l GNU/Linux root@MyCubietruck:~# cat /etc/debian_version 8.8 So I tried to find similar problems amd found: The point is: I didn't upgrade the kernel and according to my logwatch mail from this morning there was no kernel upgrade. Now I made a huge mistake: I assumed a kernel problem anyway and tried to solve it with a kernel downgrade (even though I didn't try something like this before) - and I thought should use the script provided by @Igor : ...and noticed this information too late: Well, the script (choosing "Cubietruck" and "vanilla" ended up with): ┌─Armbian universal installer 2015.11───┐ │ │ │ Removing conflicting packages ... │ │ │ └───────────────────────────────────────┘ E: Unable to locate package nstall_new E: Unable to locate package "" E: Unable to locate package "Installing E: Unable to locate package packages..." The upgrade.log says: The following packages will be REMOVED: linux-dtb-next-sunxi 0 packages upgraded, 0 newly installed, 1 to remove and 0 not upgraded. Need to get 0 B of archives. After unpacking 4,163 kB will be freed. (Reading database ... ^M(Reading database ... 5%^M(Reading database ... 10%^M(Reading database ... 15%^M(Reading database ... 20%^M(Reading database ... 25%^M(Reading database ... 30%^M(Reading database ... 35%^M(Reading database ... 40%^M(Reading database ... 45%^M(Reading database ... 50%^M(Reading database ... 55%^M(Reading database ... 60%^M(Reading database ... 65%^M(Reading database ... 70%^M(Reading database ... 75%^M(Reading database ... 80%^M(Reading database ... 85%^M(Reading database ... 90%^M(Reading database ... 95%^M(Reading database ... 100%^M(Reading database ... 105718 files and directories currently installed.)^M Removing linux-dtb-next-sunxi (5.27.170427) ...^M No packages will be installed, upgraded, or removed. 0 packages upgraded, 0 newly installed, 0 to remove and 0 not upgraded. Need to get 0 B of archives. After unpacking 0 B will be used. Note: selecting "linux-image-dev-rockchip" instead of the virtual package "linux-image-4.10.0-rockchip" Note: selecting "linux-image-sun8i" instead of the virtual package "linux-image-3.4.113-sun8i" "linux-image-3.4.112-sun8i" exists in the package database, but it is not a real package and no package provides it. "linux-image-4.8.3-sun8i" exists in the package database, but it is not a real package and no package provides it. "linux-image-4.7.3-sun8i" exists in the package database, but it is not a real package and no package provides it. Note: selecting "linux-image-dev-sun8i" instead of the virtual package "linux-image-4.10.0-sun8i" "linux-image-4.9.4-sun8i" exists in the package database, but it is not a real package and no package provides it. The following packages will be REMOVED: linux-image-next-sunxi 0 packages upgraded, 0 newly installed, 1 to remove and 0 not upgraded. Need to get 0 B of archives. After unpacking 48.8 MB will be freed. (Reading database ... ^M(Reading database ... 5%^M(Reading database ... 10%^M(Reading database ... 15%^M(Reading database ... 20%^M(Reading database ... 25%^M(Reading database ... 30%^M(Reading database ... 35%^M(Reading database ... 40%^M(Reading database ... 45%^M(Reading database ... 50%^M(Reading database ... 55%^M(Reading database ... 60%^M(Reading database ... 65%^M(Reading database ... 70%^M(Reading database ... 75%^M(Reading database ... 80%^M(Reading database ... 85%^M(Reading database ... 90%^M(Reading database ... 95%^M(Reading database ... 100%^M(Reading database ... 105562 files and directories currently installed.)^M Removing linux-image-next-sunxi (5.27.170427) ...^M update-initramfs: Deleting /boot/initrd.img-4.10.12-sunxi^M "linux-headers-2.6" is a virtual package provided by: linux-headers-sun7i linux-headers-sun5i linux-headers-sun4i You must choose one to install. Note: selecting "linux-headers-sun8i" instead of the virtual package "linux-headers-3.4.113-sun8i" "linux-headers-3.4.112-sun8i" exists in the package database, but it is not a real package and no package provides it. The following packages will be REMOVED: linux-headers-next-sunxi 0 packages upgraded, 0 newly installed, 1 to remove and 0 not upgraded. Need to get 0 B of archives. After unpacking 73.0 MB will be freed Yes, I know it is stupid but I rebooted again and ended up with: *** ERROR: 'serverip' not set missing encironment variable: bootfile Retrieving file: pxelinux.cfg/default-arm Speed: 1000, full duplex *** ERROR: 'serverip' not set missing encironment variable: bootfile Retrieving file: pxelinux.cfg/default-arm Speed: 1000, full duplex *** ERROR: 'serverip' not set Config file not found Speed: 1000, full duplex BOOTP boradcast 1 BOOTP boradcast 2 DHCP client bound to address 192.168.1.3 (2189 ms) Zsubg tgerber q01c50000 decie TFTP from server 0.0.0.0; our IP address is 192.168.1.3; sending through gateway 192.168.1.1 Filename 'boot.scr.uing'. Load address: 0x43100000 Loading: T T T T T T T T T T Retry cound exceeded; starting again sunxi# For the case it is already to late to fix this with "two or three commands" I would at least try to understand what was causing the problem: why "Failed to setup dm-crypt key mapping" today? Thx a lot for all helping comments and sorry again for the long description. sj7