Removed the installed drivers by searching for fglrx in Synaptic. 3 items were removed - dkms-fglrx, the fglrx driver and control centre.
Reboot.
Then I reset the display driver to Xorg - Vesa through PCC.
Reboot.
Run the 9.8 installer.
I dont think it installed successfully because I have this fglrx-install.log:
Creating symlink /var/lib/dkms/fglrx/8.64/source ->
/usr/src/fglrx-8.64
DKMS: add Completed.
Preparing kernel 2.6.32.11-pclos2.bfs for module build:
(This is not compiling a kernel, just preparing kernel symbols)
Storing current .config to be restored when complete
Running Generic preparation routine
make mrproper.......
using /proc/config.gz
make oldconfig....
make prepare....
Building module:
cleaning build area....
pushd /var/lib/dkms/fglrx/8.64/build; sh make.sh --nohints; popd.......
[Error] Kernel Module : Failed to build fglrx-8.64 with DKMS
[Error] Kernel Module : Removing fglrx-8.64 from DKMS