Anno domini 2021 Sat, 03 Apr 18:36:17 +0200 Uwe Brauer scripsit:
Ah yes, that's a problem. Please install "equivs", then build a dummy gtk-qt-engine-trinity package and install that ober your current package:
I finally found a working solution
1. Goto to the (trinity) control center (maybe ubuntu specific)
2. Goto Appearance, deactivate use my TDE style in GTK2/3 applications.
3. Delete in .conf the geogebra directory
4. Restart geogebra
5. DONE.
Thanks very much for you help and Slavek whose comment I did not understand at first.
Uwe