I have started to get this on my 14.04 double-header nvidia amd64 system. I can't say what events cause it, but moving a window generally fixes it until the next time. I don't need to have a lot of windows open to see it.
I have started to get this on my 14.04 double-header nvidia amd64 system. I can't say what events cause it, but moving a window generally fixes it until the next time. I don't need to have a lot of windows open to see it.