I forgot to backup the system on the TF card attached by Devterm when i open the box.
I used sudo apt update && upgrade.but i met some systemd problems after system upgrade and now the system boot abnormally.with error msg like flwg:
systemd-journald[122]: Assertion ‘clock_gettime(map_clock_id(clock_id), &ts) == 0’ failed at …/src/basic/time-util.c:55, function now(). Aborting.
I tried to find the solution but failed. I would like to re-install the respbian. I wonder whether the system installed on the TF card is customized and Is it suitable to install the orignal Raspbian iso downloaded on the official website of rpi to DEVTERM.
A good news is that i found the solution. The problem i mentioned may occur when upgrade is incomplete.Especially when source server can not be connected sometimes and the dependancy got problems.
I think in time it would be very useful to make the official images for the CM3 and A04/A06 models available somewhere permanently, and/or to document somewhere what needs to be done to make the device run when starting from a standard Raspberry Pi OS image (if that is a possibility).
For example, I am currently assuming I can start a custom installation from a Raspberry Pi OS Lite by installing a few additional packages since I saw the first devices running Raspberry Pi OS, but I’m not sure if that is also true for the A04/A06.