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From: bugzilla-noreply@freebsd.org
To: x11@FreeBSD.org
Subject: maintainer-feedback requested: [Bug 267730] graphics/drm-kmod
Screen artifacts with amdgpu
Date: Sat, 12 Nov 2022 16:46:08 +0000
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Bugzilla Automation <bugzilla@FreeBSD.org> has asked freebsd-x11 (Nobody)
<x11@FreeBSD.org> for maintainer-feedback:
Bug 267730: graphics/drm-kmod Screen artifacts with amdgpu
https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=3D267730
--- Description ---
Describe the bug:
When using amdgpu, white-on-black horizontal lines intermittently flash on
right half of screen. See video attached below in Screenshots
FreeBSD version:
FreeBSD fbsd 14.0-CURRENT FreeBSD 14.0-CURRENT #0 main-n258691-24cf7a8d628:=
Thu
Oct 20 07:55:17 UTC 2022
root@releng1.nyi.freebsd.org:/usr/obj/usr/src/amd64.amd64/sys/GENERIC amd64
pciconf:
vgapci0@pci0:9:0:0: class=3D0x030000 rev=3D0xc8 hdr=3D0x00 vendor=3D0x1002
device=3D0x1638 subvendor=3D0x1043 subdevice=3D0x8809
vendor =3D 'Advanced Micro Devices, Inc. [AMD/ATI]'
device =3D 'Cezanne'
class =3D display
subclass =3D VGA
DRM KMOD version:
drm-510-kmod 5.10.113_7
drm-kmod 20220907_1
To Reproduce:
Install either 13.1-RELEASE, 13.1-STABLE, or 14.0, install drm-kmod package,
enable amdgpu by adding kld_list=3D"amdgpu" to /etc/rc.conf, and log into a
console.
Screenshot:
https://user-images.githubusercontent.com/11449161/198061203-8056e97d-7a3d-=
4ccb
-945f-fcc6423e88cb.mp4
Additional context:
It appears support for vendor=3D0x1002 device=3D0x1638 graphics card has be=
en
added:
https://github.com/freebsd/drm-kmod/blob/5.10-lts/drivers/gpu/drm/amd/amdgp=
u/am
dgpu_drv.c#L1102
Same issue presents on any FreeBSD version listed above, whether built from
source or installed from snapshot.
Disabling video mode using hw.vga.textmode=3D1 does not resolve the issue.
The issue carries over into an X session.
Notably, the issue disappears when compiling anything, whether in the conso=
le
or X.
Github issue previously opened under freebsd/drm-kmod at
https://github.com/freebsd/drm-kmod/issues/213