Recently I´ve updated my OS from Ubuntu Budgie 20.04 to 21.04, but since the NVidia driver 440 I have problems with my external 4K displays that I use through a Thunderbolt Workstation by Dell (WD19) connected to my notebook through a RTX2060.
My problems during the last year was distortion in image from external displays, like the 2nd photo in the begining of this thread, I have installed 450 and 460 driver version, with this problem, but now with 470 my both external displays are not working, the xrand recognize the displays but there is no image on those.
So I´ve returned to 450 drive version then the displays back to show image.
Displays Dell 4K 27¨
Workstation Dell WD19 Thunderbolt 3
GraphicCard RTX 2060 Thunderbolt Output