[Nouveau] [Bug 90453] [NVE4] Desktop freezes & PDISP, PFIFO, PGRAPH and PGR errors

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=90453

--- Comment #18 from Michiel Helvensteijn <mhelvens at gmail.com> ---
This latest instance is also interesting, and might help diagnose the problem.
I was watching a YouTube video, and this time only the Chromium browser froze,
and I got a 'page unresponsive' popup. For a while, I could still move the
mouse and interact with other windows. After about 30 seconds, everything froze
once again. dmesg output:

[ 7583.945899] nouveau E[     PGR][0000:01:00.0] TRAP ch 8 [0x007f2f2000
gnome-shell[1189]]
[ 7583.945909] nouveau E[     PGR][0000:01:00.0] GPC2/PROP trap: (unknown enum
0x00000002)
[ 7583.945912] nouveau E[     PGR][0000:01:00.0] x = 3488, y = 104, format = 0,
storage type = 0
[ 7588.249980] nouveau E[   PFIFO][0000:01:00.0] SCHED_ERROR [ CTXSW_TIMEOUT ]
[ 7588.249985] nouveau E[   PFIFO][0000:01:00.0] PGR engine fault on channel
10, recovering...

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