STEPS TO REPRODUCE 1. start Wayland session 2. set "Large icons" task switcher in system settings > window management > task switcher 3. set fractional display scaling in display and monitor > display configuration (I use 1.2 scale factor) 4.. open konsole, gwenview, discover, ksysguard 5.. press alt+tab and hold alt key OBSERVED RESULT all apps mentioned above shows a pixelated icon in the task switcher EXPECTED RESULT crisp icons SOFTWARE/OS VERSIONS Operating System: Arch Linux KDE Plasma Version: 5.16.90 KDE Frameworks Version: 5.62.0 Qt Version: 5.13.1
Scale factor of 1.2 (where the fractional division are not multiple of 2) cause problems. In the display settings UI nowadays, we simply force users to use such a value as scale factor. Could you try with 1.25 ?
Same result with display scale 125%. Operating System: Arch Linux KDE Plasma Version: 5.19.0 KDE Frameworks Version: 5.70.0 Qt Version: 5.15.0
I have noticed that if you use the preview button in the systemsettings for the task switcher, the rendering is then correct. So this is an error in the code, failing to take into account the scale factor along the way, which is taken care of in systemsettings.
https://www.reddit.com/r/kde/comments/lficfe/wayland_fractional_scaling_may_be_sort_of_a/
(In reply to soredake from comment #4) > https://www.reddit.com/r/kde/comments/lficfe/ > wayland_fractional_scaling_may_be_sort_of_a/ It is not related to this issue highlighted in reddit which concerns Applications.
Cannot reproduce with display scale 125%. Operating System: Arch Linux KDE Plasma Version: 5.25.90 KDE Frameworks Version: 5.98.0 Qt Version: 5.15.6 Graphics Platform: Wayland