FCOS VM (Bhyve on TrueNAS) failing to boot after automatic update to Fedora 41 (“systemd[1]: Freezing execution”)

[LeoSum8]

Describe the bug

This morning my FCOS VM was down. I think zincati ran an update.

Upon manually rebooting it, I get the following output via VNC:

Those are the versions installed:

Reverting back to Fedora 40 and everything works again as before.

The FCOS VM is a bhyve guest on a FreeBSD (TrueNAS) Host. The guest filesystem resides in a Zvol.

Reproduction steps

Expected behavior

Boot F41 after update.

Actual behavior

Booting F41 fails, need to revert to F40

System details

FCOS as Bhyve-VM on a FreeBSD 13.1-RELEASE-p9 (TrueNAS) host.
FCOS version before update: 40.20241019.3.0 (working)
FCOS version after update: 41.20241027.3.0 (not working)

Butane or Ignition config

No response

Additional information

Initial discussion at https://discussion.fedoraproject.org/t/fcos-vm-bhyve-on-truenas-failing-to-boot-after-automatic-update-systemd-1-freezing-execution/136788/3

[dustymabe]

what kernel arguments do you have set for this system?

this looks vaguely like the issue where systemd won't boot with cgroups V1 but I don't see that message in your output you show.

[stackrainbow]

I can confirm also affected on a large amount of nodes, auto updates on, cgroups V1 enabled.
Was a little difficult to figure out what was going on apart from just rollbacking, there's no notice or information that cgroups V1 causes this apart from this issue being linked from OP's thread.