Broken transparency/inconsistent style in Qt 5 pop-up menus

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  • OpenMandriva Lx version: ROME 25.02

  • Desktop environment (KDE, LXQT…): Plasma 6.3.1

Hello. So OM ROME doesn’t ship by default with the Qt5 Breeze theme (plasma6-breeze-qt5) for some reason, so qt5 apps use fusion. Installing the package resolves this, except pop-up menus look a bit awkward, notably the contrast of grayed out text and the squared corners (Qt 6 apps are not affected)

Screenshot_20250223_082052

The thing that bothers me most is broken transparency of the menu when enabled from system settings > colors & themes > application style > breeze (configure style button) > transparency, which looks even messier

Screenshot_20250223_082306

This is not an issue on Fedora KDE but can be reproduced on Arch KDE, so this seems to indicate a missing package (some KDE/Qt5 integration plugin?) rather than a bug. I’ve tried installing various packages that seemed to be the required ones but couldn’t pinpoint anything. Any suggestions?

There’s a similar UI integration issue with the plasma title bar not following a Qt (5/6) app’s custom color scheme (Krita or any program with customized color scheme), which works on fedora. the workaround is using a window rule (Titlebar color scheme). Wondering if this also related.

This is the intended look for pop-up menus for reference

Screenshot_20250223_083257

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Since this is the case, it is probably a “won’t fix,” just because we are pushing forward with Qt6/KF6/Plasma 6 in version 6.0. If there are apps still using Qt5 there may be some dependencies held over until they have completed porting to Qt6 (like Krita).

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Aw okay, I’ll take it there is no such package in the repo then
Unfortunately krita and vlc are indeed still stuck on qt 5 (reason for the former is some missing stuff in Qt6 iirc)

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