There's a workaround in duplicate bug https://bugs.launchpad.net/ubuntu/+bug/326363.
Bornio says:
Actual workaround:
1. Start your session 2. Go to terminal (ctrl+alt+F1) and kill compiz.real via killall compiz.real -s KILL 3. go back to your session (ctrl+alt+F7) 4. remove /dev/nvidiactl (this will be regenerated next time you restart GDM) 5. start compiz
There's a workaround in duplicate bug https:/ /bugs.launchpad .net/ubuntu/ +bug/326363.
Bornio says:
Actual workaround:
1. Start your session
2. Go to terminal (ctrl+alt+F1) and kill compiz.real via killall compiz.real -s KILL
3. go back to your session (ctrl+alt+F7)
4. remove /dev/nvidiactl (this will be regenerated next time you restart GDM)
5. start compiz