Bug 412118

Summary: After I enable fractional display scaling on Wayland, Plasma and Qt5 apps already running become blurry until they are restarted
Product: [Plasma] KScreen Reporter: Patrick Silva <bugseforuns>
Component: commonAssignee: kscreen-bugs-null <kscreen-bugs-null>
Status: RESOLVED DUPLICATE    
Severity: normal CC: claudius.ellsel, katyaberezyaka, nate
Priority: NOR Keywords: wayland
Version: 5.20.90   
Target Milestone: ---   
Platform: Arch Linux   
OS: Linux   
Latest Commit: Version Fixed In:

Description Patrick Silva 2019-09-20 12:50:02 UTC
STEPS TO REPRODUCE
1. start Wayland session
2. open any app that runs natively on Wayland, let's say Dolphin
3. search for "display configuration" KCM in the apps launcher and open it
4.. change display scale factor from 1 to 1.2

OBSERVED RESULT
Dolphin and Plasma look blurry. 
Dolphin is not blurry after you restart it and Plasma is not blurry after relogin.

EXPECTED RESULT
Apps and Plasma are crisp immediately after fractional display scaling to be enabled.

SOFTWARE/OS VERSIONS
Operating System: Arch Linux 
KDE Plasma Version: 5.16.90
KDE Frameworks Version: 5.62.0
Qt Version: 5.13.1
Comment 1 Patrick Silva 2020-05-15 14:17:19 UTC
Operating System: Arch Linux 
KDE Plasma Version: 5.18.90
KDE Frameworks Version: 5.70.0
Qt Version: 5.15.0 rc2
Comment 2 Claudius Ellsel 2020-08-10 11:06:10 UTC
Marking as confirmed. I think I experienced exactly the same behavior, also noticeable looking at the mouse cursor.
Comment 3 Nate Graham 2021-06-01 16:15:57 UTC

*** This bug has been marked as a duplicate of bug 433416 ***