https://bugs.kde.org/show_bug.cgi?id=423733
Bug ID: 423733
Summary: Global scaling leads to rendering problems
Product: kwin
Version: 5.19.2
Platform: Manjaro
OS: Linux
Status: REPORTED
Severity: major
Priority: NOR
Component: xrandr
Assignee: kwin-bugs-n...@kde.org
Reporter: hanspet...@mail.de
Target Milestone: ---
Created attachment 129813
--> https://bugs.kde.org/attachment.cgi?id=129813&action=edit
Rendering artifacts in console (simplest to reproduce)
SUMMARY
When using the global scale dail in the settings, and setting it to anything
other than 100%, some applications start to flicker and on other parts of the
screeen I get rendering artifacts. In the attached screenshot you can see these
artifacts in the console.
This problem makes it unusable, and to work on 100% scaling on a 4K screen
isn't really fun either.
STEPS TO REPRODUCE
1. (Probably optional, I can't test it) Use high DPI monitor, in my case 2K or
4K
2. Set global scale in settings to a value above 100%
3. If everything seems to work proberly, open a console and paste some lines
(see screenshot)
OBSERVED RESULT
Flickering applications due to a general rendering problem, regardless of the
video driver and tearing in some places
EXPECTED RESULT
Prober rendering
SOFTWARE/OS VERSIONS
Linux/KDE Plasma: 5.7.6-1-MANJARO
KDE Plasma Version: 5.19.2
KDE Frameworks Version: 5.71.0
Qt Version: 5.15.0
ADDITIONAL INFORMATION
Using GTX 970 as GPU, tried video drivers video-nvidia-440xx, video-linux,
video-modesetting.
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