Built a new computer with these specs:
AMD A6 5400k process with AMD Radeon HD7540D graphics (built-in)
8GB Crucial RAM
I can install and run Ubuntu 12.04. But if I try to update to Ubuntu 12.10 or just install 12.10, the computer just hangs on boot at a blank purple screen.
Note: I tried 13.04, same issue.
Figured this out. For whatever reason it would not boot if the live USB was plugged into a USB3.0 port on the computer.
After switching to one of the 2 USB 2 ports it worked correctly.
Seems like a bug with USB3.0 in Ubuntu. Worked properly on other machines though (driver problem maybe).