Originally Posted by bactrimel
In every case, I was able to revive the desktop by toggling composite off-on, using the KDE4 hotkey (Alt-Shift-F12). I suspect there is a way to perform a similar toggle in Gnome.
As far as I know there is no way to toggle compositing as gnome shell always relys on full hardware acceleration and compositing. I'm wondering whether this issue only occurs on my setup.