For example Anki or kontact fail to start with the following error:
Gdk-Message: 14:26:27.203: python3: Fatal IO error 2 (No such file or directory) on X server :0.0.
Is happening in 2 different computers with different graphic cards and version of the driver
GeForce GTX 1060 6GB with driver 460.32.03
GeForce GT 710 with driver 450.80.02
Both run debian/testing
Ive debugged this with my distro and they came to the conclusion that the problem is in the nvidia driver which they cant not debug further :(
More details in: https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=979707