STEPS TO REPRODUCE 1. start Wayland session 2. enable fractional display scaling in "Display configuration" KCM (I use 1.2 scale factor) 3. OBSERVED RESULT buttons, icons and text of the windows decorations look blurry. The icons and the text also look blurry in the context menu of the windows decorations. EXPECTED RESULT windows decorations and their context menus look crisp SOFTWARE/OS VERSIONS Operating System: Arch Linux KDE Plasma Version: 5.16.90 KDE Frameworks Version: 5.62.0 Qt Version: 5.13.1
Created attachment 122750 [details] example of blurry window and not blurry
The problem is not only for fractional display. The strange thins is that it happens for some applications but not all e.g. it is blurry for firefox, gimp, inkscape, chrome, chromium but not for digikam, dolphin, Kate, nautilus or Libreoffice.
Dolphin and Kate are affected on my system. Firefox, GIMP, inkscape are also affected because they are Xwayland apps (see bug 412088).
It will be great that a non fractional scaling working again in 5.17.1 If scaling is 2 it is considered as a real instead of an integer and so Xwayland application are blurry. This is a clear regression from 5.16 and plasma wayland cannot be used if any Xwayland apps is needed and there are still plenty of them around!
Operating System: Arch Linux KDE Plasma Version: 5.18.90 KDE Frameworks Version: 5.70.0 Qt Version: 5.15.0 rc2
(In reply to humufr from comment #1) > Created attachment 122750 [details] > example of blurry window and not blurry I don't see the window decorations (title, close button for example) to be blurry here (at least not more than for Kate). Are you sure you don't mean the content of the window like the tabs?
https://www.reddit.com/r/kde/comments/lficfe/wayland_fractional_scaling_may_be_sort_of_a/
*** Bug 444395 has been marked as a duplicate of this bug. ***
I can confirm that on my system this issue appears as well. I have a primary UHD display that uses 125% scaling and a secondary FHD display that uses 100% scaling. You can clearly see a difference between the sharpness of the content of the window and the window decorations.
is firefox there running in XWayland?
C.f. https://invent.kde.org/plasma/kwin/-/issues/86 (Fractional Scaling)
Cannot reproduce with Breeze decoration and 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: X11
Created attachment 152192 [details] Screenshot showing blurry decoration
I can still reproduce this on Plasma 5.25, especially when using custom themes like Materia (see Screenshot).
(In reply to lrdarknesss from comment #14) > I can still reproduce this on Plasma 5.25, especially when using custom > themes like Materia (see Screenshot). you are facing bug 438401
(In reply to Patrick Silva from comment #15) > (In reply to lrdarknesss from comment #14) > > I can still reproduce this on Plasma 5.25, especially when using custom > > themes like Materia (see Screenshot). > > you are facing bug 438401 Ah okay, thanks for the hint. When using just the default Breeze theme, the font isn't too sharp either (might be a general fractional scaling problem), but it's much better than with custom themes.
(In reply to lrdarknesss from comment #16) > When using just the default Breeze theme, the font isn't too sharp either > (might be a general fractional scaling problem) You are right. See bug 446674