I run a Toshiba Portege Z930 with Linux Mint 14. The graphics card is not very powerfull (Intel HD Graphics 4000) but everything just works out of the box, including suspending and hibernation.
I have the same laptop then you and the same OS.
Unfortunately, I have two major problems: suspending/hibernation and 3G.
May I perhaps contact you directly by email? It would be nice if you could give me some hints.
Thank you in advance!