Bug 502185

Summary:	Screen glitch on internal GPU
Product:	[Plasma] kwin	Reporter:	Sven Grewe <svengrewe>
Component:	wayland-generic	Assignee:	KWin default assignee <kwin-bugs-null>
Status:	RESOLVED WORKSFORME
Severity:	major	CC:	kdedev, nate
Priority:	NOR	Keywords:	wayland-only
Version First Reported In:	6.3.3
Target Milestone:	---
Platform:	Neon
OS:	Linux
Latest Commit:		Version Fixed In:
Sentry Crash Report:
Attachments:	Screen Glitch Video

Description Sven Grewe 2025-03-29 23:48:19 UTC

SUMMARY
Graphical glitch appears on one monitor. It happens often with the mouse cursor and visible everywhere on that screen when the system is under load. Some application aren't really affected though on the relevant screen.

Both monitor (16:9 and 4:3) are connected to two GPUs.

SOFTWARE/OS VERSIONS
Operating System: KDE neon 6.3
KDE Plasma Version: 6.3.3
KDE Frameworks Version: 6.12.0
Qt Version: 6.8.2
Kernel Version: 6.8.0-56-lowlatency (64-bit)
Graphics Platform: Wayland
Graphics Processor 1: AMD Radeon RX 570 Series
Graphics Processor 2: Intel® HD Graphics 530

Comment 1 Sven Grewe 2025-03-29 23:49:39 UTC

*Each monitor is connected to one monitor.

Comment 2 Sven Grewe 2025-03-30 00:24:58 UTC

The issue is still there with only the 4:3 monitor connected to the pc

PS: What did I wrote previously  lol.

Comment 3 Sven Grewe 2025-03-30 00:27:51 UTC

Created attachment 179853 [details]
Screen Glitch Video

Comment 4 Nate Graham 2025-03-31 19:53:02 UTC

Likely a GPU driver issue of some kind.

Comment 5 Sven Grewe 2025-04-06 21:14:09 UTC

Probably and I can't narrow this further down at the moment if it's e.g. exclusive to VGA or not. I didn't saw this happen on Debian 13 with newer kernel and drivers though. It also doesn't seem to matter which monitor size or format it directly has.

Comment 6 TraceyC 2025-07-10 21:43:38 UTC

If this is still happening in Plasma 6.4.2, with an updated kernel, it's likely an issue with the AMD Mesa drivers.

Please read https://docs.mesa3d.org/bugs.html and submit a bug report for the Mesa developers. Feel free to link it to this report.

Thanks!

Comment 7 Bug Janitor Service 2025-07-25 03:46:44 UTC

🐛🧹 ⚠️ This bug has been in NEEDSINFO status with no change for at least 15 days. Please provide the requested information, then set the bug status to REPORTED. If there is no change for at least 30 days, it will be automatically closed as RESOLVED WORKSFORME.

For more information about our bug triaging procedures, please read https://community.kde.org/Guidelines_and_HOWTOs/Bug_triaging.

Thank you for helping us make KDE software even better for everyone!

Comment 8 Bug Janitor Service 2025-08-09 03:46:50 UTC

🐛🧹 This bug has been in NEEDSINFO status with no change for at least 30 days. Closing as RESOLVED WORKSFORME.

Comment 9 Sven Grewe 2025-08-22 12:41:23 UTC

This doesn't seem to happen any more with the new KDE Neon LiveCD release. So pretty likely a driver fix with the newer ISO.

Comment 10 TraceyC 2025-08-22 17:14:55 UTC

Great to hear. Thanks for letting us know.