Created attachment 129813 [details] 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.
Are you using fractional scaling?
(In reply to Vlad Zahorodnii from comment #1) > Are you using fractional scaling? I am not quite sure what fractional scaling is. I set the global scale (and only the global scale not some font size settings etc.) in the plasma settings-menu to 125% or 150%.
(In reply to Hans from comment #2) > I am not quite sure what fractional scaling is. Scale factors that are not multiple of 100 are known as "fractional scale factors," e.g. 125%. *** This bug has been marked as a duplicate of bug 373232 ***