You need -exactly- Catalyst v13.1 for very good reasons

[epixoip]

The way I upgraded my servers from 12.8 to 13.1 was:

Code:

stop lightdm
sh amd-driver-installer-8.982-x86.x86_64.run --uninstall=force
rm -f /etc/X11/xorg.conf*
reboot -f
sh amd-driver-installer-catalyst-13.1-linux-x86.x86_64.run
amdconfig --adapter=all --initial
reboot -f

Maybe give that a shot if you start running out of options.