I had a working Ubuntu 10.04 desktop with ATI drivers with three monitors on a Radion HD 5750.
After a standard
apt-get update; apt-get upgrade; reboot
I got a black screen (system booted, but graphics did not display at login screen). I went into recovery mode and reset to basic graphics mode.
Currently, the Catalyst control center says the ATI driver is not installed. But the "hardware drivers" tool (jockey) says "ATI Fire GL" is installed and in use.
So either: 1. The driver is not actually installed even though jockey claims it is, or 2. The driver is installed but catalyst can't find/use it.
I used apt-get to purge and then reinstall the ATI drivers with no improvement.
How do I get this driver working again? Is there a way to completely purge/remove everything graphics related and start over like a clean system, but without an OS reinstall?