I have a Dell Precision M70 that shows as the VGA adapter:

VGA compatible controller: NVIDIA Corporation NV17GL [Quadro4 500 GoGL]
(rev a3).

After upgrading to 12.10 the unity manager does not appear, however the background picture is shown. Everything else appears to be working. If the unity version in 12.10 is not suitable for this hardware I wouldn't mind changing the manager, however I would much like to keep unity. I would appreciate any hint on how to fix the problem.