March 10, 2014 in answer
I’m not sure this is the correct answer, but I’ll have a go. Try this page. Extracted instructions:
sudo sh /usr/share/ati/fglrx-uninstall.sh sudo apt-get remove --purge fglrx*
followed by the following for the sake of making sure all is clean:
sudo apt-get remove --purge xserver-xorg-video-ati xserver-xorg-video-radeon sudo apt-get install xserver-xorg-video-ati sudo apt-get install --reinstall libgl1-mesa-glx libgl1-mesa-dri xserver-xorg-core sudo mv /etc/X11/xorg.conf /etc/X11/xorg.conf.backup sudo rm -f /etc/ati
That should remove all previous FGLRX drivers you had. Now you’re back to the fresh Ubuntu graphics setup. This question provides an answer on how to get FGLRX working with Kaveri, but you had already seen that question.