https://bugs.kde.org/show_bug.cgi?id=476045
Bug ID: 476045
Summary: AMD Zen4 APU Display Issue
Classification: Plasma
Product: kwin
Version: 5.27.8
Platform: Archlinux
OS: Linux
Status: REPORTED
Severity: major
Priority: NOR
Component: multi-screen
Assignee: kwin-bugs-n...@kde.org
Reporter: jarr...@proton.me
Target Milestone: ---
SUMMARY
AMD 7700X IGPU does not fully function as a secondary monitor source under
Plasma Wayland but does work in GNOME and other wayland desktop environments.
STEPS TO REPRODUCE
1. Connect the iGPU to a external DP monitor. (1440p used)
2. Log into Plasma Wayland and setup multi display configuration and APU IGPU
as secondary.
3. Drag mouse cursor or windows into iGPU Display space to see issue(s)
OBSERVED RESULT
The desktop connected to the iGPU will have no cursor and produce odd artifacts
but otherwise will let user drag a window onto it and even watch video
correctly, but you will notice odd artifacts and delays when doing so.
EXPECTED RESULT
No artifacts when dragging windows around and mouse cursor rendering correctly.
SOFTWARE/OS VERSIONS
Linux/KDE Plasma: 6.5.8-zen
(available in About System)
KDE Plasma Version: 5.27.8
KDE Frameworks Version: 5.111.0
Qt Version: 5.15.11
ADDITIONAL INFORMATION
This issue has persisted for quite some time, possibly since Zen4 launch. It
has existed over many KDE Plasma versions and has yet to be fixed nor have I
found any real direct solutions or workaround for this particular issue.
Changing refresh rates on any/all displays does not fix the issue. Unable to
disable primary display to test iGPU out by itself, it just resets to multi
display config.
Possibly its triggered by the primary gpu being on HDMI and the iGPU being on
DP?
Happy to produce logs on request, unsure which ones would be useful atm.
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