SUMMARY After power-cycling my monitor, Wayland-native apps are blurry (rescaled from 100% up to 200% by simple stretch), and X11-compatible apps are reset to 100% scaling. STEPS TO REPRODUCE 1. Log in using Wayland session. 2. If not yet, enable display scaling in KDE Settings: 200% in my case (I have a single 3840x2160 screen), then re-login. 3. Open a few Wayland-native apps, e.g. Konsole, Doplhin, Settings etc. 4. Turn off your display. Then turn it back on. OBSERVED RESULT Native Wayland apps are be blurry, and XWayland-ed apps reset their scaling to 100% instead of 200%. EXPECTED RESULT Nothing should change about the scaling. SOFTWARE/OS VERSIONS Linux: 5.15.76-1-MANJARO 64 bit KDE Plasma Version: 5.26.2 KDE Frameworks Version: 5.99.0 Qt Version: 5.16.0 ADDITIONAL INFORMATION AMD RX 5600XT Using Display Port 1.4 to connect the LG-24UD58 display.
Have you seen this with a Wayland-native app that isn't using Qt? Qt in particular seems to have problems when the scale factor changes, which might explain this
I am also running into this issue on Fedora. It first started occurring a few weeks ago on Fedora 36 when I installed Plasma 5.26 from Fedora's updates-testing repo. I was hoping it would be fixed when updating to Fedora 37, but alas, it is still happening. This only happens with Qt applications; Firefox, Thunderbird, Electron (Signal Desktop), and GTK (GNOME Calculator) are unaffected. I have a 3840 x 2160 screen that I use with my desktop. My laptop also has a 3840 x 2160 screen but is unaffected, so I suspect there is some setting which is contributing to this.
This bug comes closest to what I've just experienced after a monitor power cycle. Falkon, which usually crashes when I do that, instead is rendering fonts rather blurry all of a sudden, while dolphin, konversation, kmail (all had been running already) and systemsettings (new instance after monitor power-on) are fine. 150% scaling in my case. Operating System: Gentoo 2.13 KDE Plasma Version: 5.27.3 KDE Frameworks Version: 5.104.0 Qt Version: 5.15.8 Kernel Version: 6.1.11-gentoo (64-bit) Graphics Platform: Wayland Processors: 24 × AMD Ryzen 9 3900X 12-Core Processor Memory: 62,7 GiB of RAM Graphics Processor: AMD Radeon Graphics Product Name: X570 Phantom Gaming-ITX/TB3
Created attachment 157303 [details] blurry-falkon.png here's a screenshot of it. Falkon went back to normal after restart.
Created attachment 157308 [details] blurry-kmail.png After a lot of power cycles, the same now happened to kmail. Everything below the title bar is blurry.
I can replicate this with a AMD GPU but not on my laptop with integrated Intel GPU. And it seems like all other reports also have AMD GPUs.
wayland clients being blurry is a client bug not a kwin bug. Qt 6.5 should fix things a lot there, we did some big fixes, but we need the clients to upgrade. Can you clarify what the xwayland issue is? Can you attach output of xrandr -q along with your monitor resolution and expected scale.
FWIW this is fixed for me in Plasma 6 with all Qt apps I use, since they've been ported.
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This bug has been in NEEDSINFO status with no change for at least 30 days. The bug is now closed as RESOLVED > WORKSFORME due to lack of needed information. For more information about our bug triaging procedures please read the wiki located here: https://community.kde.org/Guidelines_and_HOWTOs/Bug_triaging Thank you for helping us make KDE software even better for everyone!