Bug 506127

Summary:	Half display and intermittent black screen
Product:	[Plasma] kwin	Reporter:	menguele
Component:	wayland-generic	Assignee:	KWin default assignee <kwin-bugs-null>
Status:	REOPENED ---
Severity:	major	CC:	xaver.hugl
Priority:	NOR
Version First Reported In:	6.3.5
Target Milestone:	---
Platform:	Arch Linux
OS:	Linux
Latest Commit:		Version Fixed/Implemented In:
Sentry Crash Report:

Description menguele 2025-06-24 22:50:10 UTC

SUMMARY
A sudden power outage cause Kwin the desktop to be displayed incorrectly, with only top half to be displayed and the screen turning black intermittently when any mouse movement is involved or the Plasma Launcher being "invoked".

It happened thrice now, the first time I was able to resolve it by moving kwinrc and plasma-org.kde.plasma.desktop-appletsrc as well as “killing” kwin and relogin through sddm to a x11 session and reinstalling kwin, wayland, mesa and xf86-video-amdgpu just for good measure and rebooting.

Currently, even doing the aforementioned methods to restore the settings to default, the Wayland Plasma session remains with those issues.

this is a log generated from cachyos-bugreport: https://paste.cachyos.org/p/719efeb.log



SOFTWARE/OS VERSIONS
Operating System: CachyOS Linux 
KDE Plasma Version: 6.4.0
KDE Frameworks Version: 6.15.0
Qt Version: 6.9.1
Kernel Version: 6.15.3-2-cachyos (64-bit)
Processors: 16 × AMD Ryzen 7 5700X3D 8-Core Processor
Memory: 8 GiB of RAM (7.7 GiB usable)
Graphics Processor: AMD Radeon RX 7600

Comment 1 Zamundaaa 2025-06-25 13:19:26 UTC

This is a driver bug, see https://gitlab.freedesktop.org/drm/amd/-/issues/4307

Comment 2 menguele 2025-07-20 14:51:15 UTC

I researched into it and I don't think https://gitlab.freedesktop.org/drm/amd/-/issues/4307 is the same problem, but probably also a firmware issue. Anyway, it turns out if there is a power failure here which causes the computer and the monitor to shutoff, and the Freesync option is turned on, in the monitor OSD, it causes the bug, only resolving after I switch off, reboot the pc and switch on Freesync again.

It only occurs if the compositor is setting automatically or if manually setting VRR option.