Bug#969258: nvidia-driver: Graphical performance drop in both XFCE and OpenGL apps since the nvidia-driver 450.57-3 update

[William Scot]

Edit: there is still a link with the nvidia driver, since the problem 
appeared after the 440.100 driver, and all was fine when downgrading to 
it (which is not anymore possible, since there are errors building the 
nvidia module).