Musescore 4.4 doesn't start - probably qt6 / qt5 incompatibilities

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1

Hello!

I’m trying to use musescore 4.4 on leap 15.6 from the multimedia repository as usually. Unfortunately, the 4.4 version doesn’t work at all, because of the following qt6 error:

2024-10-13T20:50:22.055 | ERROR | main_thread     | GuiApp::perform | error: qrc:/qml/platform/linux/Main.qml:29:1: Type AppWindow unavailable
2024-10-13T20:50:22.055 | ERROR | main_thread     | GuiApp::perform | error: qrc:/qml/AppWindow.qml: module "org.kde.desktop" is not installed
2024-10-13T20:50:22.055 | WARN  | main_thread     | Qt              | qrc:/qml/platform/linux/Main.qml:29:1: Type AppWindow unavailable
2024-10-13T20:50:22.055 | WARN  | main_thread     | Qt              | qrc:/qml/AppWindow.qml: module "org.kde.desktop" is not installed
2024-10-13T20:50:22.056 | ERROR | main_thread     | GuiApp::perform | failed Qml load

I tried to set the environment variable
QT_QUICK_CONTROLS_STYLE=Material or Basic
which doesn’t solve the problem either.

Does have anybody any idea how to fix this problem? Maybe there is something missing? All dependencies have been resolved during installation. The problem can be seen here on all machines - not just one.
I tried to compile the src package by my self (which has been working flawlessly) - but the behavior is the same. Compiling the tumbleweed src package 4.3.2 works fine again - but that’s no surprise, because 4.3.2 is a qt5 app.

I know that flatpak or the original appimage from musescore is working - but that’s not the answer to this question :slight_smile:

Btw: I don’t run Plasma 6 and I don’t want to run it!

Thanks!

2

But it is complete unclear what you run. I do not know what the program is, but searching a bit gives me the impression that it is a GUI program. So you probably have some GUI environment.

3

As Desktop, Plasma 5 (based on QT 5 / X11) is used - but this should be irrelevant. The problem is the musescore package and its dependency to QT6 of the multimedia repository, which is broken. Maybe the multimedia maintainer is reading here, too. He should know this application.

All other musescore packages (vendor package and flatpak) are working fine. Therefore it must be a problem of how the package in multimedia is built and maybe missing dependencies.

4

ILL you need some Qt 6 parts being installed (in KDE 5).

5

Most maintainers don’t monitor the forums. If you have a suggestion for how to fix things, you’d be better off filing a bug against the package.

6

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