1 – Compile and install driver:
Source: http://wiki.cchtml.com/
sudo aptitude install build-essential cdbs fakeroot dh-make debhelper debconf libstdc++5 dkms sh ati-driver-installer-9-7-x86.x86_64.run --buildpkg Ubuntu/jaunty sudo dpkg -i xorg-driver-fglrx_*.deb fglrx-kernel-source_*.deb fglrx-amdcccle_*.deb
2 – Generate base xorg.conf:
sudo aticonfig --initial=dual-head sudo aticonfig --dtop=horizontal
Note: you can do “dpkg-reconfigure xserver-xorg” to reset you xorg.conf to default values.
3 – Log out and log in to use the new xorg.conf
4 – Activate multi-screen & compiz:
Source: http://www.uluga.ubuntuforums.org/showthread.php?p=7552538
Start ATI Catalyst Control Center as root:
sudo amdcccle
Now, go in Display Manager -> Multi-Display -> Big Desktop right fo display 1
Then start compiz: System -> Preferences -> Appearence -> Visual Effects