So I bought a new graphics card (HD 6450) and installed the Catlyst drivers from AMD's website for linux, and after restarting, Ubuntu just hangs after GRUB on the Ubuntu load screen. I tried to boot in failsafe mode as well, and the same thing happens. I'm wondering if it thinks I have more than one monitor (I don't) and if it's only showing me the second one.

I have no idea what to do, please help!