setup crashdumps. there is a wiki someplace for how to set them up and how to test that crashdumps are working right.
And leave the screen on the text console, you may get a kernel dump. If you get a kernel dump and/or kernel message on the screen odds are it is a software issue.
Usually on a fatal hw issue (PCIe error, machine check exceptions) the bios will reset the machine immediately and you won't get a crashdump/message on the screen but the machine will be found up but rebooted.
None of the MB vendors price support(they only provide warranty of the hw, and will usually immediately claim it is a software issue) into their products and will look for any excuse to say not their issue.
On Tue, May 17, 2022 at 8:03 AM stan via users <users@xxxxxxxxxxxxxxxxxxxxxxx> wrote:
On Tue, 17 May 2022 07:46:09 -0400
Sam Varshavchik <mrsam@xxxxxxxxxxxxxxx> wrote:
> No, everything's frozen, no response. It usually hangs overnight,
> with the monitor sleeping. No response from the keyboard, no pings
> from the network. The only thing to do is to hit reset and reboot.
>
> Nothing gets logged in syslog. journalctl shows the normal noise,
> then dead silence.
Maybe switch to a console before leaving it for the night. And run
something in the console to constantly monitor the system, like top, but
more informative. Then when it freezes, the last things running and
their issues are already on screen.
I vaguely recall having an issue with a screensaver having a memory
leak, and when the system was down for longer periods of time, it would
do a freeze like this. I don't recall the exact details. There was no
OOM killer then, and I'm not sure the OOM killer would take care of
that.
And I had something like this happen when a power supply was going
flaky. The voltages had drifted out of spec as it decayed.
SSH into the system to see if it responds?
Tough problem to diagnose.
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