Hi Benjamin On Sat, Feb 22, 2025 at 6:27 AM Benjamin Marty via lists.yoctoproject.org <info=benjaminmarty...@lists.yoctoproject.org> wrote: > > Hello > > I'm using the meta-raspberrypi (scarthgap) layer on a Raspberry Pi CM4 > with an A/B root filesystem setup, updated via RAUC. After completing > an update, RAUC triggers a reboot using the standard reboot command. > However, the CM4 often freezes during shutdown or the subsequent boot, > requiring a power cycle to recover. > > Symptoms: > - The system hangs after systemd-shutdown messages, sometimes showing > a kernel backtrace. > - The system sometimes hangs during booting between systemd messages, > location is random. No kernel backtrace or other error messages in > these cases. > - The kernel backtraces vary from time to time and across kernel > versions. (6.6.22, 6.6.30, 6.6.70, 6.6.74) > - This issue has not been observed yet when running Raspbian on the > same hardware. (without RAUC) > - Unclear whether the kernel stops entirely or if it's a systemd-related > issue. > - The issue occurs on both a custom carrier board and the CM4IO carrier. > > I'm currently running a stress test where the system repeatedly > applies RAUC updates and reboots every few minutes. Under this setup, > the issue occurs every few days to weeks, making it difficult to > reproduce consistently. Because of this, I’m unsure whether this is a > fundamental issue or just a rare edge case. > > Has anyone encountered similar behavior with CM4 and meta-raspberrypi? > Any suggestions on debugging strategies would be greatly appreciated. >
There could be general unpredictability in boot/shutdown sequence. I think you might want to run a reboot cycle test, e.g. https://bec-systems.com/942/running-a-reboot-cycle-test-shell-script-with-systemd/ If the reboot cycle is still running after 24 hours then you can deduce that the issue is to be looked at further in relation to RAUC update or other subsystems. > I’ve also started an issue in the meta-raspberrypi repository: > https://github.com/agherzan/meta-raspberrypi/issues/1409 > > Thanks > > Benjamin > > >
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