OK. Got a weird one. On an Nvidia GPU and sometimes when waking it from sleep, I get this.
It only seems to effect the desktop background (at absolute worst, effects then active videos), goes away when rebooting.
I assume it's a display driver buffer corruption, but I have no clue one way or the other.
Anyone seen this before? Also maybe a good way to do a display driver refresh? I think windows had a hotkey combination to do that.