>At the moment it seems that kded is being ran as xcb so the per-screen scaling isn't being set u
All scaling will be half-broken since that change anyway. Running clients in xwayland means we lose all client high DPI support. >. Also system settings shows the behavior for xcb instead of the one for wayland also with the per-display UX broken. Systemsettings knows what backend the kscreen daemon is using, which is sensible behaviour. It should be fixed by the kded change. ---- We might have a big problem. Even though 5.11 now has fallback support I'm not convinced that changing the default QT_QPA_DEFAULT_PLATFORM_NAME is going to happen for 5.11. That will be a big problem.