Originally Posted by Lamieur
About the overlay problem (video leaking through anything that's black): go to text console (Alt+Ctrl+F2), get back to your Xorg (Alt-F1? Alt-F7?), problem disappears.
That was on 260.x. I'm trying 270.41.19 and it doesn't go away with vt switches, this time I needed to disable hardware accel for good.