SUMMARY i have two monitors with 2560x1440 but since one is 15" and one 27" im scaling the 15" to 125% to get a relative readable font. but sometimes when either logging in or launching applications from the desktop icons the non scaled monitor flickers and somehow corrupts/changes like its trying to scale itself. screenshot https://i.imgur.com/fiwgri4.jpg , ignore the white bar on the left scaled monitor thats something spectacle adds. this can be "reverted" by simply disabling the non scaled monitor in system settings and enabling it again. sadly it doesnt happend always so its not all to easy to reproduce. STEPS TO REPRODUCE 1. use dual monitors 2. scale one monitor 3. at random when logging in or launching applications from desktop icons it "flickers/rescales" the second monitor. doesnt seem to occur when launching things from either konsole or alt + f2. SOFTWARE/OS VERSIONS Linux/KDE Plasma: 6.5.2-arch1-1 (64-bit) KDE Plasma Version: 5.27.7 KDE Frameworks Version: 5.109.0 Qt Version: 5.15.10
i have been backporting various commits and merge requests just for fun tinkering and hopes that i manage to get https://invent.kde.org/plasma/kwin/-/merge_requests/4177 built ontop of plasma5. now something like two thirds there and like 30 merge requests later. this has stopped happening so might be fixed in plasma 6/kwin master. the issue was not because of my tinkering, its occuring on the default kwin from repos.
(In reply to Tom Englund from comment #0) I have an issue that I believe is the same as yours. Two monitors, both 100% scale, but different resolutions. Right monitor is 2560x1440, left monitor is 1920x1080. https://drive.google.com/file/d/1T2mxoXvcXV24PVpx1o_KmV48A8FBOE1k/view?usp=sharing (the video is poor quality but downloading the file helps slightly) It seems random, with the exception of one pattern I noticed: if I have a window maximized on the left monitor (1080p) and drag it down/right. However, I don't remember if this happened every time. > this can be "reverted" by simply disabling the non scaled monitor in system settings and enabling it again. I will try this next time it happens. I am able to revert it by logging out, but not by locking. Operating System: Debian GNU/Linux 12 KDE Plasma Version: 5.27.5 KDE Frameworks Version: 5.103.0 Qt Version: 5.15.8 Kernel Version: 6.1.0-28-amd64 (64-bit) Graphics Platform: Wayland Graphics Processor: AMD Radeon RX 6700 XT
(In reply to daninshed from comment #2) Can confirm that I can revert it by disabling my 1440p monitor. The glitch has happened twice since my previous comment and I was able to do this both times. Uncheck "Enabled", hit apply, monitor goes dark, hit revert, monitor comes back up and the glitch disappears.