kern/56727: i915drmkms in current causes audio playback distortion

[nia%pkgsrc.org@localhost]

>Number:         56727
>Category:       kern
>Synopsis:       i915drmkms in current causes audio playback distortion
>Confidential:   no
>Severity:       serious
>Priority:       medium
>Responsible:    kern-bug-people
>State:          open
>Class:          sw-bug
>Submitter-Id:   net
>Arrival-Date:   Mon Feb 21 16:50:00 +0000 2022
>Originator:     nia
>Release:        current
>Organization:
The NetBSD Foundation
>Environment:
NetBSD amnesia 9.99.93 NetBSD 9.99.93 (GENERIC) #0: Wed Feb 16 20:31:43 UTC 2022  mkrepro%mkrepro.NetBSD.org@localhost:/usr/src/sys/arch/amd64/compile/GENERIC amd64
>Description:
Under load, the playing audio stream becomes strongly distorted
(the specific distorted frequencies seem to be varied), seemingly
after light system load spikes (although it is easy to trigger
with casual web browsing and youtube). Disabling the i915drmkms
driver eliminates the problem and makes doing audio work possible
again.
>How-To-Repeat:

>Fix:
userconf disable i915drmkms