When I upgraded to kernel 3.7.1 my nvidia drivers stopped working. I was able to fix it by following a thread that suggested using the Siduction experimental repository.
How big are the risks of leaving that repository active? Would I be better off disabling it and only enabling it should I really need to?
This q has been answered a while ago. Leave it open.
http://forum.siduction.org/index.php?topic=3090&highlight=