Bug 512627

Summary: Graphical artifacting across applications on kwin_wayland
Product: [Plasma] kwin Reporter: ronnytommy548
Component: wayland-genericAssignee: KWin default assignee <kwin-bugs-null>
Status: NEEDSINFO WAITINGFORINFO    
Severity: normal CC: xaver.hugl
Priority: NOR    
Version First Reported In: 6.5.3   
Target Milestone: ---   
Platform: Arch Linux   
OS: Linux   
Latest Commit: Version Fixed/Implemented In:
Sentry Crash Report:
Attachments: Video example of dragging a widow and seeing thin graphical artifacts
Screenshot of artifacting in PIA client

Description ronnytommy548 2025-11-26 02:45:42 UTC
Created attachment 187181 [details]
Video example of dragging a widow and seeing thin graphical artifacts

SUMMARY
I experience graphical artifacting when dragging certain windows around, sometimes when scrolling/typing in Konsole, and in the settings menu of Private Internet Access client. The symptom is always 1-pixel wide horizontal/vertical lines. I don't think it's a GPU/driver problem, because I completely replaced my Nvidia GPU with an AMD GPU, and the problem is still present. I believe this is a kwin_wayland specific problem, because switching to Xfce (either Wayland or X11) completely fixes the problem.

STEPS TO REPRODUCE
It's not clear how to reproduce this in a consistent way, or if other people can even reproduce it at all. The video attached shows it happening in real time. If someone else had this problem, they would notice it frequently.

OBSERVED RESULT
Graphical artifacting in form of thin horizontal/vertical lines of pixels. Example screenshot + video are attached.

EXPECTED RESULT
No graphical artifacting

SOFTWARE/OS VERSIONS
kinfo output:
Operating System: Arch Linux 
KDE Plasma Version: 6.5.3
KDE Frameworks Version: 6.20.0
Qt Version: 6.10.0
Kernel Version: 6.17.9-arch1-1 (64-bit)
Graphics Platform: Wayland
Processors: 24 × 12th Gen Intel® Core™ i9-12900KF
Memory: 64 GiB of RAM (62.6 GiB usable)
Graphics Processor: AMD Radeon RX 7900 XT

ADDITIONAL INFORMATION
Comment 1 ronnytommy548 2025-11-26 02:46:17 UTC
Created attachment 187182 [details]
Screenshot of artifacting in PIA client
Comment 2 Zamundaaa 2025-11-27 21:03:06 UTC
This looks like an issue with damage tracking.

Please attach the output of kscreen-doctor -o.
Also, next time you see this happening, please open the kwin debug console (search for it in krunner to open it) and look up the frameGeometry of the window in question. We need the last two values specifically (the size of the window).
Comment 3 Bug Janitor Service 2025-12-12 03:46:14 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.

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