I guess this patch fixes the issue:
commit b05f65d7720b172b6fde3abfa49ed66837071d45
Author: Alex Deucher <[email protected]>
Date: Thu Aug 15 08:27:09 2019 -0500
drm/amdgpu/gfx9: update pg_flags after determining if gfx off is
possible
We need to set certain power gating flags after we determine
if the firmware version is sufficient to support gfxoff.
Previously we set the pg flags in early init, but we later
we might have disabled gfxoff if the firmware versions didn't
support it. Move adding the additional pg flags after we
determine whether or not to support gfxoff.
Fixes: 005440066f92 ("drm/amdgpu: enable gfxoff again on raven series (v2)")
Tested-by: Kai-Heng Feng <[email protected]>
Tested-by: Tom St Denis <[email protected]>
Signed-off-by: Alex Deucher <[email protected]>
Cc: Kai-Heng Feng <[email protected]>
Please test latest mainline kernel:
https://kernel.ubuntu.com/~kernel-ppa/mainline/v5.4-rc5/
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https://bugs.launchpad.net/bugs/1848741
Title:
[amdgpu] Ubuntu 19.10 horizontal graphics corruption on AMD Ryzen
2500u (Raven Ridge)
Status in linux package in Ubuntu:
Confirmed
Status in xserver-xorg-video-amdgpu package in Ubuntu:
Confirmed
Bug description:
I have graphics artefacts: screan tearing, pieces of the previous window
appear in the newly opened window.
---
ProblemType: Bug
ApportVersion: 2.20.11-0ubuntu8
Architecture: amd64
CurrentDesktop: ubuntu:GNOME
DisplayManager: gdm3
DistroRelease: Ubuntu 19.10
InstallationDate: Installed on 2019-09-08 (42 days ago)
InstallationMedia: Ubuntu 19.04 "Disco Dingo" - Release amd64 (20190416)
Package: gnome-shell 3.34.1-1ubuntu1
PackageArchitecture: amd64
ProcVersionSignature: Ubuntu 5.3.0-18.19-generic 5.3.1
RelatedPackageVersions: mutter-common 3.34.1-1ubuntu1
Tags: eoan
Uname: Linux 5.3.0-18-generic x86_64
UpgradeStatus: Upgraded to eoan on 2019-10-17 (3 days ago)
UserGroups: adm cdrom dip docker input lpadmin plugdev sambashare sudo
_MarkForUpload: True
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