kern/56901: i915: Asynchronous wait on fence timed out (slowly dying X server)

[nia%pkgsrc.org@localhost]

>Number:         56901
>Category:       kern
>Synopsis:       i915: Asynchronous wait on fence timed out (slowly dying X server)
>Confidential:   no
>Severity:       serious
>Priority:       medium
>Responsible:    kern-bug-people
>State:          open
>Class:          sw-bug
>Submitter-Id:   net
>Arrival-Date:   Sat Jun 25 06:40:00 +0000 2022
>Originator:     nia
>Release:        NetBSD 9.99.98 (GENERIC) #0: Mon Jun 20 18:06:28 UTC 2022  mkrepro%mkrepro.NetBSD.org@localhost:/usr/src/sys/arch/amd64/compile/GENERIC amd64
>Organization:
TNF
>Environment:
NetBSD 9.99.98 (GENERIC) #0: Mon Jun 20 18:06:28 UTC 2022  mkrepro%mkrepro.NetBSD.org@localhost:/usr/src/sys/arch/amd64/compile/GENERIC amd64
>Description:
X server slowly dies, with screen content no longer being updated.

The X driver is the built-in "modesetting" one.

[ 214164.183262] Asynchronous wait on fence i915drmkms0:X[4015]:50f30e timed out (hint:0xffffffff80742b40)
[ 214165.923258] i915drmkms0: notice: Resetting rcs0 for preemption time out
[ 214165.923258] i915drmkms0: notice: firefox91[19431] context reset due to GPU
>How-To-Repeat:

>Fix:
Killing the X server, switching to a text console, then restarting X
resolves the problem.