[Nouveau] [Bug 110996] swaywm (wayland) crashes when turning off monitors through dpms

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=110996

--- Comment #1 from Ilia Mirkin <imirkin at alum.mit.edu> ---
What was the first group of errors before the first "core notifier timeout"?
That should help inform why there was a gpu hang. Actually, can you reproduce
when booted with

drm.debug=0x14 nouveau.debug=disp=trace

and then reproducing this issue. Only the first few sets of errors are
interesting (really the first, usually), everything after that is just
follow-on fail.

Looks like there are two bugs here, BTW:

1. We hang the EVO engine somehow
2. We have some kind of page map fail with evo_wait (hence the BUG at the end)

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