First off, this is the proprietary driver for AMD Radeon HD owners, version AMD Catalyst 12.8. So far, there is not solution for GNOME 3 tearing problem… just minor bugfixes included though.
If this is your first install, you need these
sudo apt-get install build-essential cdbs dh-make dkms sudo apt-get install execstack dh-modaliases fakeroot libqtgui4
In case of are 64 bit Operating System, install these too
sudo apt-get install ia32-libs ia32-libs-multiarch:i386 sudo apt-get install lib32gcc1 libc6-i386 cd /usr ; sudo ln -svT lib /usr/lib64
Then browse intoyour Downloads folder where is the driver located and run the executable
chmod +x amd-driver-installer-8.982-x86.x86_64.run
Create and install deb packages
sudo sh ./amd-driver-installer-8.982-x86.x86_64.run --buildpkg Ubuntu/precise sudo dpkg -i fglrx*.deb
Warning, if you are upgrading from an older Catalyst version, you should run:
sudo sh ./amd-driver-installer-8.982-x86.x86_64.run --buildpkg Ubuntu/precise sudo dpkg --force-overwrite -i *.deb
Now, please Enable new settings
sudo aticonfig --initial -f
Reboot you PC and you are ready to go 😉
— Otherwise —, if you are not into building deb packages and such stuff, then you are advised to to insert the xorg-edgers PPA and search for the new fglrx package
sudo add-apt-repository ppa:xorg-edgers/ppa sudo apt-get update sudo apt-get upgrade sudo apt-get install fglrx-installer
If this is the case, just be sure you have purged the PPA before upgrading to the next version of Ubuntu (such as Ubuntu 12.10).