I was having problems playing games, etc. In fullscreen mode (Glest, Nexuiz, and similar games) because the screen would mess up and I wouldn't be able to see how to exit the program, let alone play it. So I tried to update my ATI driver, and their website pointed me to installing a package for the ATI Catalyst Control Center. I did so, and restarted my computer, and couldn't get into my computer, had to go into recovery mode, and I got my computer working by typing these three lines:

sudo apt-get --purge remove xorg-driver-fglrx

dpkg-reconfigure -phigh xserver-xorg

sudo /etc/init.d/gdm restart

Which worked, but now the menu item for 'ATI Catalyst Control Center' is still there, and I don't know how to uninstall it, and when I go to System > Administration > Hardware Drivers and try to activate the 'ATI/AMD proprietary FGLRX graphics driver' it downloads okay, but when I restart my computer it will go through the loading everything with the [OK] things at the end, and stop. The screen will flicker black a few times, then stay at the cli loading-type thing (forgive me lack of proper words, I don't quite know what their called). I have to type those three lines above to get it to show the GUI again.

Also, the same thing occurs when I plug in a second monitor. It seems to set up fine, but when it tells me to restart and I do so, it 'crashes'. I can't remember exactly what it does, but I have to (again) type those three lines to get it to work. How do I fix this so that I can use my ATI drivers and also hopefully set up dual monitors?

My specifications are as follows:

Ubuntu 8.10 (i386) on an Acer Extensa 4420:

AMD Athlon 64 x2 Dual-Core prosessor TK-57
896 MB Ati Radeon X1250 Hypermemory

Any help or suggestions would be greatly appreciated. I've scoured the internet trying to find an answer but can't seem to find anything.