Created attachment 294817
attachment-13720-0.html

After some more digging around, I see the following in `journalctl -b-1`
:

    Jan 23 14:48:41 quasar-nixos-tr kernel: xhci_hcd 0000:09:00.3: Mismatch 
between completed Set TR Deq Ptr command & xHCI internal state.
    Jan 23 14:48:41 quasar-nixos-tr kernel: xhci_hcd 0000:09:00.3: ep deq seg = 
00000000734e9686, deq ptr = 00000000f203822a

and indeed, the "crashes" I experience also seem to be accompanied by 
all my USB devices (mouse, keyboard) losing power.

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https://bugs.launchpad.net/bugs/1690085

Title:
  Ryzen 1800X freeze - rcu_sched detected stalls on CPUs/tasks

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