Problem with visual window

Hello everyone!!!
I tried to install geant4-v11.2.1 in my Ubuntu 22.04 version but when I run every example it shows the window of visuals but not the geometry as you can see in the screenshot. I don’t know how to describe the issue so if you can help me solve it.

Thank you for your time.

In full scale of the visual window to help you understand better the issue. In the blank area it always show me the background (Terminal, Desktop etc.)

Are you running Wayland or X11? There is a problem if you have compiled Geant4 to use X11 (-DGEANT4_USE_OPENGL_X11=ON) and Qt (-DGEANT4_USE_QT=ON), but your login session is running Wayland. If this is the problem, the simplest solution is to use a login session with X11.

Thanks for your time and effort sir, you fixed my issue.

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