Hi everyone, This is a weird one.
I have been running Geant4 10.6.1 successfully since its release. I just upgraded my computer from Fedora 30 to 32. The upgrade was successful with no problems. To avoid any library issues, I always reinstall the latest version of Geant when I do a Fedora upgrade. So I rebuilt and reinstalled Geant4 10.6.1 as I usually do:
cmake -DGEANT4_BUILD_CXXSTD=c++11 -DGEANT4_BUILD_MULTITHREADED=ON -DGEANT4_USE_OPENGL_X11=ON -DGEANT4_USE_QT=ON -DGEANT4_INSTALL_EXAMPLES=ON -DGEANT4_INSTALL_DATA=ON -DCMAKE_INSTALL_PREFIX=/home/jmcfee/geant4/geant4.10.6.p01-install /home/jmcfee/geant4/geant4.10.06.p01
make -j8
$ make install
It was successful. To test that all was well, I built example B1 from the G4 distribution:
./exampleB1
Available UI session types: [ Qt, GAG, tcsh, csh ]
QSocketNotifier: Can only be used with threads started with QThread
G4WT0 > /control/saveHistory
$ G4WT1 > /control/saveHistory
…
When I ran it, the Qt gui interface appeared but the rectangular window where the geometry layout should be was “see through”, that is empty and I could see whatever of the desktop was behind it (see figure attached). This also occurs with other programs from the distribution and my own as well. There are no error messages in the command window and none in the terminal window other than the “QSocketNotifier:…” message, which I do not know if it is even an error or warning. Has anyone come across this and know how to fix it?