I have a Dell XPS 720 that Mint 5 works great on. Mint 6 will not boot, it goes to a mint@mint prompt and won't start the GUI. if you type startx it gives you this:
Fatal server error:
no screens found
xinit: Connection refused (errno 111): unable to connect to X server
xinit: No such process (errno 3): Server error.
I would really like to upgrade to 6 and would like to get past this problem. This happens with the 64 or 32 bit version.