After upgrading from l4t 35.2 to 35.3 today, my AGX Orin Devkit started involuntarily suspending after a certain amount of time. This is during active usage.
The last details I saw in the UART console were the following:
Actually; it looks like this was an issue with only partially removing ubuntu-desktop (at some time prior to the upgrade) and not updating default systemd target (user error); after completing the additional steps:
It seems the system is no longer suspending automatically. My only guess is that the dist-upgrade may have (re)-enabled a possible ubuntu builtin auto-suspend feature (because I had rebooted the system previously many times without triggering this auto-suspend).
Anyway, sorry for the false alarm.
This can be closed now.