I had a similar problem. After seeing some kernel messages, the monitor was turned off by the gfx card/driver and I was unable to install Ubuntu. As a "workaround" I used the "Server" version of Ubuntu and installed the X stuff later.
-- [edgy] livecd (amd64) won't boot into graphical interface https://launchpad.net/bugs/58821 -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
