SUMMARY Since upgrading to Fedora 40 KDE spin, both login and splash screen customisation from previous versions is now unworkable. I am also unable to access menu items in many applications (File menu works OK, takes a lot of fiddling to access any others with the mouse). Occasional flickering of windows also occurs. STEPS TO REPRODUCE 1. Start System Settings/Colours & Themes 2. Select downloaded custom theme in Global, Splash Screen or Login Screen (SDDM) 3. Reboot OBSERVED RESULT Only the default themes (Trees -> KDE splash) appears. Often an error message (Main.qml:23:1:module QtQuickControls ver 1.1 not installed) appears on the login screen - depending upon which login theme is selected. The ONLY apparent difference is the layout of the user selector, the background remains the 'tree' theme, apparently drawn by a 10-y-o! Completely unable to effect any change to splash. EXPECTED RESULT Display of the selected theme(s) SOFTWARE/OS VERSIONS Windows: macOS: Linux/KDE Plasma: (available in About System) KDE Plasma Version: 6.0.4 KDE Frameworks Version: 6.2.0 Qt Version: 6.7.0 ADDITIONAL INFORMATION I have searched for a means to install QuickControls, the only sources are directed to programmers using qml and none are at all helpful (I cannot even find if I have a .qml file, much less add the link...)
Third-party splash screens may need adjustments to work with Plasma 6, this is expected and not a bug. Does the default "Breeze" splash screen work?
Created attachment 169519 [details] attachment-1070093-0.html Nicholas, The ONLY theme that works is the default (Breeze?). I have tried several of the downloadable styles (the previous ones such as Oxygen no longer appear to be supported?), none of which work and several encounter the error message quoted. I also cannot find any useful advice on QuickControls anywhere.
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I have confirmed QuickControls IS installed (somewhere on the system??); but Plasma obviousluy camnnot locate it.
Still got the problem, crickets from this site. The comment "Third-party splash screens may need adjustments to work with Plasma 6, this is expected and not a bug." is less thanhelpful, because NOWHERE can I find any advice on how to 'adjust' third party splash screens etc.
To be precise: QtQuick Controls 1 was removed in Qt 6, which Plasma 6 uses. As such, all old splash screens need to be rewritten to use QtQuick Controls 2. Porting info about widgets can be found at https://develop.kde.org/docs/plasma/widget/porting_kf6, which is much more exhaustive than what's needed for typical splash screens. It should simply be a matter of replacing functionality that was removed in Qt 6 with the newer equivalent.