Problems related to Flatpak packaging

[KelvinNovais]

There are two problems that only happens with the Flatpak package:

1. Transport / play panel unusable in Fedora Linux musescore/MuseScore#21036
2. MuseScore crashes when changing theme musescore/MuseScore#22206

Have in mind that these issues aren't found on the AppImage.
Apparently the developers won't support the Flatpak format, only AppImage; I think even the .deb and .rpm aren't supported anymore.

I tried to discover the problems, and the solution was replace the Ubuntu runtime/base versions with the following:

# org.musescore.MuseScore.yaml

---
app-id: org.musescore.MuseScore

base: io.qt.qtwebengine.BaseApp
- base-version: '5.15-23.08'
+ base-version: '5.15'

runtime: org.kde.Platform
- runtime-version: '5.15-23.08'
+ runtime-version: '5.15'
sdk: org.kde.Sdk

[...]

However, these runtimes are end-of-life. Do you think there is another solution?
Here is a short video with the results, everything is working fine:

2024-04-30.13-04-32.mp4

[hfiguiere]

You suggest to use a runtime that is EOL.

[hfiguiere]

the proper solution is to debug the code and find proper fixes.

[hfiguiere]

See also #119.

[KelvinNovais]

You suggest to use a runtime that is EOL.

I'm aware of that, but I was wondering if there is another solution, because shouldn't 5.15-23.08 behave the same as 5.15?
Trying to fix something that was supposed to work without problems is weird... will that be stable on new releases?

[KelvinNovais]

It seems that org.kde.PlatformTheme.QGnomePlatform is the root of the problem. Uninstalling it solves the theme and the panel issues...

Do you know if there's a way to disable it only in this package, instead of uninstalling?

[KelvinNovais]

I tried to override QT_QPA_PLATFORMTHEME, and also other things, but didn't solve. It lacks some documentation.

I'm going to close this issue, since these bugs are already reported here and on QGnomePlatform repository.

Moreover, this project is currently unmaintained. I hope it can be replaced or fixed soon on future updates.