https://bugs.kde.org/show_bug.cgi?id=500450
Bug ID: 500450
Summary: Weird resizing issues in some OpenGL apps in Plasma
6.3.0
Classification: Plasma
Product: kwin
Version: 6.3.0
Platform: Fedora RPMs
OS: Linux
Status: REPORTED
Severity: normal
Priority: NOR
Component: scene-opengl
Assignee: kwin-bugs-n...@kde.org
Reporter: eduard.moldova...@outlook.com
Target Milestone: ---
Created attachment 178627
--> https://bugs.kde.org/attachment.cgi?id=178627&action=edit
glxgears resizing bug
SUMMARY
I have a strange behavior in glxgears and an app i made using SkiaSharp, which
internally uses OpenGL. When I resize the window, the content covers it really
slow instead of instantly. Since this isssue is also present in glxgears, I
assume it’s not my code at fault, since this only started to happen after I
upgraded to Plasma 6.3.0. Also, the app runs fine on Windows 11.
STEPS TO REPRODUCE
1. Use Plasma 6.3.0
2. Launch glxgears from the terminal
3. Resize the window slowly or rapidly and see how it is redrawn
OBSERVED RESULT
The contents update really slowly and the drawing falls behind in pace compared
to the resizing. It looks as if the surface can't keep up the pace of redrawing
with the resizing.
EXPECTED RESULT
The contents update normally, (almost) instantly following the window's size,
like the other apps
SOFTWARE/OS VERSION
Linux/KDE Plasma: Fedora KDE 41 (Wayland), Kernel version 6.12.13-200
KDE Plasma Version: 6.3.0
KDE Frameworks Version: 6.11.0
Qt Version: 6.8.2
ADDITIONAL INFORMATION
I also attached a videos with glxgears being resized, to better observe the
behavior
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