Not any more. Here is quick info how to install most recent proprietary drivers in no time and make your Ubuntu rolling more smoothly.
First, open terminal and start with next commands:
sudo apt-get remove --purge fgrlx*
(just in case you have tried the official drivers, provided in Ubuntu repos)
sudo apt-get update
sudo apt-get upgrade
these are not necessary, but recommended, next install all things needed for drivers to run on your machine:
sudo apt-get linux-headers-generic
optionally, for 64 bit systems, install also
sudo apt-get install ia32-libs lib32gcc1 libc6-i386
There is PPA for most recent ATI drivers, just add it to your repository list and install the drivers:sudo add-apt-repository ppa:andrikos
sudo apt-get update
sudo apt-get install fglrx-updates xserver-xorg-video-intel
sudo aticonfig --initial --force
Finally, reboot your system and enjoy
To check you are running ATI drivers after reboot, install mesa-utils:
sudo apt-get install mesa-utils
glxinfo | grep -i render
Thats all. This worked for me, let me know if not for you. And dont forget to check the ATI control center in your apps lens. In case you find your computer is too hot, switch temporary to integrated graphics and use discrete graphics card for games only.
EDIT: in case there is watermark showing "for testing use only", follow next link:
http://askubuntu.com/questions/206558/how-to-remove-the-amd-testing-use-only-watermark-from-ubuntu-12-10
