https://bugs.kde.org/show_bug.cgi?id=422415
Bug ID: 422415
Summary: White horizontal lines when watching video
Product: kwin
Version: 5.18.5
Platform: Ubuntu Packages
OS: Linux
Status: REPORTED
Severity: normal
Priority: NOR
Component: compositing
Assignee: kwin-bugs-n...@kde.org
Reporter: io...@abv.bg
Target Milestone: ---
SUMMARY
STEPS TO REPRODUCE
1. Make sure compositor is enabled with OpenGL 2.1 and vsync set to auto.
2. Watch video on Firefox or start chat app with video support like Skype.
OBSERVED RESULT
Over some time one can see small white horizontal lines on the screen (with
around 4-5 mm in width). I have tried different vsync options in composer
section but the only thing that made the lines to go away is to set vsync off
(with side affect that tearing appeared).
EXPECTED RESULT
No white lines should appear.
SOFTWARE/OS VERSIONS
Windows:
macOS:
Linux/KDE Plasma: Ubuntu 20/x64 (had the same issue with Ubuntu 18.04)
(available in About System)
KDE Plasma Version: 5.18.5
KDE Frameworks Version: 5.68.0
Qt Version: 5.12.8
ADDITIONAL INFORMATION
OpenGL Information
GL_VENDOR: Intel Open Source Technology Center
GL_RENDERER: Mesa DRI Intel(R) Iris(R) Pro Graphics P5200 (HSW GT3)
GL_VERSION: 3.0 Mesa 20.0.4
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