
Originally Posted by
Rigaldo
It does sound like a Catalyst problem ... But to be on the safe side, I'll add these. Ubuntu 12.10 had the issue of (for some reason) not including the kernel headers .... You can easily install them though by adding the "linux-headers-generic" package(assuming you have vanilla kernel, for pae etc there's a similar package you should install). It's needed to properly install fglrx/Catalyst. If you didn't have that, then you should try installing it and purging-reinstalling Catalyst.
Also make sure sure to run "sudo amdconfig --initial -f" at the end of installation(manual or from repos). You probably did that, but I mention it to be on the safe side.
Btw, by unbootable, you mean like black screen with a blinking cursor, it just hangs when about to launch X, your wallpaper is the only thing appearing, kernel panic message and forced to shut down. Mostly curiosity. If I have a clue of what you could do more I'll share with you for sure though. Cheers.
**Edit: It may be bootable with nomodeset if Catalyst breaks it still. No 3d, but you can restore it to before and fix it possibly(desktop probably not working, so I'd suggest using a virtual terminal then). If it's not bootable even with that after installing Catalyst, there's probably some serious stuff going on there ...