Created attachment 152110 [details] Screen recording STEPS TO REPRODUCE 0. Two screens (2k@100% + 4k@200% primary) 1. Legacy Applications (X11): Apply scaling themselves 2. Open VLC with `QT_SCREEN_SCALE_FACTORS=2 /usr/bin/vlc` on the primary screen 3. Move it to the secondary screen OBSERVED RESULT The VLC window looks fine as expected while dragging it to the secondary screen, but once dropped there, it scales too small (like 0.5 for the @100% screen). Please see the screen recording. SOFTWARE/OS VERSIONS Operating System: openSUSE Tumbleweed 20220914 KDE Plasma Version: 5.26.80 KDE Frameworks Version: 5.98.0 Qt Version: 5.15.5 Kernel Version: 5.19.8-1-default (64-bit) Graphics Platform: Wayland Graphics Processor: AMD Radeon RX 580 Series
Created attachment 152111 [details] kWin Support Info
Looks like VLC is trying to be too clever. With the value unset what does VLC do? Also what happens on real X11.
Created attachment 152117 [details] Screenshot: VLC with vale unset (In reply to David Edmundson from comment #2) > With the value unset what does VLC do? Its UI buttons scale too small and it looks the very same on both screen. > Also what happens on real X11. Will check that too.
> Also what happens on real X11. Not sure how I gonna test this, because when basically do `source ~/development/kde/build/kde/workspace/kwin/prefix.sh && dbus-run-session ~/development/kde/local/bin/startplasma-x11` it won't start the plasma session saying > $DISPLAY is not set or cannot connect to the X server The var is indeed unset, but setting it to e.g. :0 did resolve it. Maybe I will test it with KDE Neon Unstable instead later.
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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!