I think this probalem is ATI or ATI-AMD related for the most part.... but not sure.
seems similar to: https://launchpad.net/distros/ubuntu/+source/xserver-xorg-video-ati/+bug/22985 -- Install 6:10 Failure: Black screen at Live Desktop Stage https://launchpad.net/bugs/67487 -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
