if you have a problem with gdm and gnome 3.8 like me when you start the system de gdm only show the wallpaper, no mouse and not response you need to do its a press f1 or f2 and in the moment gdm start but when you login gnome shell have the same problem only wallpaper no mouse and not response, so wait a bit (5-10 secs) and press f1 or f2 again and wuala gnome start, and you can reboot your computer and at this time it start without the needed of press f1 or f2.
works for me test it
but if you delete the .config .cache .local etc you need to do the same thing for make it work
and sorry for the bad english im spanish!
You should be posting here in thi big thread with similar problems.
LENOVO Y 580 IVYBRIDGE 660M NVIDIA
Unix is user-friendly. It just isn't promiscuous about which users it's friendly with. - Steven King