you need to remove the fglrx driver and install the open source Radeon driver.
use this as a guide:
https://help.ubuntu.com/community/RadeonDriver
You'll probably have to click on the link under "Removing the proprietary fglrx driver." Tha'ts what you need to do. Also ignore the part about adding the xorg-edgers PPA, because that doesn't work with Gnome-shell either.
Read up on it first, but for me, these terminal commands and a reboot got me going:
Code:
sudo /usr/share/ati/fglrx-uninstall.sh # (if it exists)
sudo apt-get remove --purge fglrx*
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 dpkg-reconfigure xserver-xorg
Once you get it running to your liking, to change it so you automatically boot up into gnome-shell instead of Unity run this command in the terminal:
Code:
sudo /usr/lib/lightdm/lightdm-set-defaults -s gnome-shell
to undo that so it boots back into Unity by default:
Code:
sudo /usr/lib/lightdm/lightdm-set-defaults -s ubuntu
this will get gnome-shell working. The open source drivers are pretty good, but you will take a performance hit if you play 3d games like Urban Terror or Oil Rush. So if you don't care about that, the open source drivers are the way to go.
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