You are not logged in.
- Run in gnome session (latest, so 3.18).
- Switch to a 2nd session (Ctrl+Alt+F2), then do:
startx -- :2- Switch back to 1st session (Ctrl+Alt+F3)
Desktop wallpaper totally garbled. No functionality loss, and if a wallpaper is reset, all works fine.
Offline
This happens with NVIDIA drivers. The last time I looked through bug reports was two weeks ago or so, and there was no solution for the problem. I think I remember a developer writing that he'll fix it if someone tells him how to detect the tty switch.
Offline