Hard Freeze, Usually When Idle. Possibly AMD related

Virtually all of the March deployments involve some sort of bug that causes my system to hard freeze, sometimes within 15 minutes of being left idle, nearly always after being left on over night. The screen will be frozen with the time on it so I can see when it happened, but there are no logs whatsoever (e.g., via journalctl -b -1 -k and journalctl -b -1). The only way to recover is by holding the power button to shut it down.

Suspend is also disabled in power management settings because I was running into issues with the CPU intermittently overheating on resume before the fans could kick on.

Is anyone else running into this? I’ve tried deploying various commits back into February at this point as all of the March builds seem to have this problem. February is TBD. Is there some way to get the logs before the system goes completely dead?

System Specs:

AMD Ryzen 7 5800X
AMD Radeon 6600XT
32GB RAM
Aorus x570 Elite Wifi (latest firmware)
Kinoite 41.20250331.0 → 41.20250221.0
KDE Plasma 6

Thanks!

When it freezes, are you able to switch to a different tty (ctrl+alt+F3)?

Nope, it’s completely toast. No tty switching, sysrq, SSH, etc.