Tim Janssen wrote: 
> I use debian server on my NUC to run a low powered home server. It freezes
> every 2-3 days what looks to be a kernel bug. From a lot of testing it only
> occurs when the ethernet cable is inserted and it seems it has to do
> something with low power mode (c-states). These issues have been reported
> ever since kernel 5.10. I wonder if the debian devs are aware of this issue
> and if a fix is undereway.


Things that you really ought to tell us:

- CPU?
- model or motherboard identifier?
- have you tried disabling low C states in BIOS?
- you say it's been reported across major kernel releases --
  what bug numbers?
- are there any log entries written before it freezes?
- can you avoid it by not unplugging/replugging the ethernet
  cable?
- what ethernet NIC is in use?
- have you run htop or another means to disable power saving on
  the NIC?

...and probably a dozen other things, but start there.

-dsr-

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