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  1. I use image linux-image-current-meson64=20.02.8 5.4.28-meson64, kernel set by apt upgrade RTC battery connected. Try to perform setup by instruction seems nwclock can't work: lsmod|grep rtc rtc_meson_vrtc 20480 1 ls -l /dev/rt* lrwxrwxrwx 1 root root 4 Mar 30 18:28 /dev/rtc -> rtc0 crw------- 1 root root 252, 0 Mar 30 18:28 /dev/rtc0 hwclock hwclock: select() to /dev/rtc0 to wait for clock tick timed out root@droid:~# hwclock -w hwclock: ioctl(RTC_SET_TIME) to /dev/rtc0 to set the time failed: Invalid argument How to set hardware clock correctly? Previously I use earlier ubuntu-based armbian kernel 4.* on same device, and hardware clock woks. It brokes after swtching to a new image with new kernel.
  2. Alan in Sydney, Australia. I've loaded: eoan desktop, Linux aml 5.5.0-rc6-aml-s9xxx #rc1.038 SMP PREEMPT Thu Feb 6 10:21:51 MSK 2020 from the file and upgraded. root# mkdir -p /sys/kernel/config/device-tree/overlays/i2c3a cannot create directory ‘/sys/kernel/config/device-tree’: Operation not permitted What am I trying to do? On an Odroid N2 compile with GCC 10 (from Fedora) "neural networks" code (FreeDV) using the ARMv8 SVE extensions. (Odroid N2 is not supported on Fedora)