[marble] [Bug 499838] New: Marble Maps and Marble Behaim freezes after launch on X11

[Balló György]

https://bugs.kde.org/show_bug.cgi?id=499838

            Bug ID: 499838
           Summary: Marble Maps and Marble Behaim freezes after launch on
                    X11
    Classification: Applications
           Product: marble
           Version: 24.12.2
          Platform: Arch Linux
                OS: Linux
            Status: REPORTED
          Severity: major
          Priority: NOR
         Component: general
          Assignee: marble-bugs at kde.org
          Reporter: ballogyor at gmail.com
  Target Milestone: ---

SUMMARY
When I try to launch Marble Maps or Marble Behaim in an X11 session (Plasma X11
or GNOME on Xorg), it freezes immediately after the window present, and I have
to kill the process. On the console, I can see a lot of messages like this:

QObject: Cannot create children for a parent that is in a different thread.
(Parent is Breeze::WidgetStateEngine(0x55af1cee20f0), parent's thread is
QThread(0x55af1afa8420), current thread is QSGRenderThread(0x55af1e00c290)

It does not happen on Wayland, or when I explicitly set the QT_QUICK_BACKEND to
software.

STEPS TO REPRODUCE
1. Log in into Plasma X11 or GNOME on Xorg
2. Launch Marble Maps or Marble Behaim

OBSERVED RESULT
The application window freezes after launch.

EXPECTED RESULT
The application should be functional.

SOFTWARE/OS VERSIONS
Distribution: Arch Linux
KDE Plasma Version: 6.3.0
KDE Frameworks Version: 6.10.0
Qt Version: 6.8.2

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