I've installed 12.10 on a MacBook Pro 8,2 via the EFI install image. No dual boot; OS X is gone.

So far, so good, except:

I've installed both the Radeon proprietary drivers offered by Additional Drivers. After reboot into either, the Dash and the top panel are missing.

I've done an "apt-get purge fglrx*" and returned to the default driver. However, the fans come up when there is disk activity.

So...

Would the system run cooler with an fglrx driver?

How can I get the right FGLRX driver installed?

I know my way around Nvidias, but AMD's are all new to me.

(lspci shows only the Radeon card.)