Behavior : whenever the system goes into suspend, be it manually or automatically, on resume I get a black screen with a cursor.
If I kill kscreenlocker_greet I can access my desktop again.
If I disable screenlocking I don’t get the black screen.
Running 5.8.6-1 with 450xx nvidia drivers. Same behavior with 5.7.19-2
Added to which, after resuming from suspend I get a corrupted left panel (showing only a black bar) in system settings.
This behavior does not manifest itself with 440xx nvidia drivers, only the 450xx ones.