I've been dealing with issues for about a week with my unraid server
It's a ryzen based system - 5600G on an X570 motherboard

It randomly reboots (often in the middle of the night) and sometimes locks up halfway through the reboot or locks up during the day

After doing a LOT of troubleshooting (including an overnight memtest which passed fine), it appears to be global C-States - after disabling them in bios the server stayed up for 3 days with zero issues, I then re-enabled them and it reset on the first night

I was originally on 7.2.5 - tried upgrading to 7.3.0 - tried updating motherboard BIOS - none of which made any difference

I've attached diagnostics but they don't show much as the syslog is just happily doing it's thing then reboot out of nowhere

For now I've disabled global c-states again to get stability but I'm really intrigued why this is a thing now - my server's been running for years with perfect stability then about a week ago this started - no hardware changes at all - the only thing that happened is a power cut, my UPS kicked in but due to a degraded battery cut out before the full shutdown had occured so I had one unclean shutdown then for the following 3 days constant reboots and lock ups.

Would be interested if anyone has any thoughts or similar issues?

jarvis-diagnostics-20260518-0755.zip

Edited May 18May 18 by PhilBarker
added clarity around memtest

See igf this helps: https://forums.unraid.net/topic/46802-faq-for-unraid-v6/page/2/#findComment-819173

Thanks Jorge

Power Supply Idle Control - for some reason just doesn't exist on my X570 board
Disabling global c-states 100% seems to fix it but it's just weird for me that they've been on for like 3+ years with no issues and now they cause crashing
I did read about increasing ryzen voltage

TBH with you I'm very tempted to swap the board and CPU out for an intel setup - ryzen on linux just seems a bit meh - and if I'm gonna do a board swap it makes sense to do it now before I switch to TPM licensing and internal boot

Thanks ☺️