To properly revert the graphic drivers to the out of the box state do the following commands in a terminal. sudo apt-get remove -purge xorg-driver-fglrx fglrx* sudo apt-get remove -purge fglrx* sudo apt-get install build-essential cdbs fakeroot dh-make debhelper debconf libstdc+6 dkms libqtgui4 wget execstack libelfg0 dh-modaliases sudo apt-get install -reinstall libgl1-mesa-glx libgl1-mesa-dri sudo mv /etc/ X11/xorg.conf /etc/ X11/xorg.conf.old sudo dpkg-reconfigure xserver-xorg Now reboot your system and everything will be fine.
The Options Users with ATI cards basically have these options: Standard Open Source Drivers Usually stable. These drivers currently have relatively poor 3 D performance, but newer 3 D drivers using the Gallium3 D infrastructure are under development. Edge Open Source Drivers These drivers have improved 3 D performance The Ubuntu Way Use the restricted-driver management system (a.k.a jockey) that comes with Ubuntu to install the proprietary drivers. Install the proprietary drivers manually Package-based install of a driver downloaded from AMD/ ATI's site. Open Source Drivers By default, Ubuntu will already try to use one of the open source drivers for your hardware. If the feature set and stability work for you, then you don't need to change anything. The drivers that may be used are vesa Lowest common denominator across all graphics vendor, not many features. ati Actually a thin wrapper that will invoke the radeon driver (or another ati open-source driver for pre- Radeon cards). radeon Driver support all radeon classes of hardware - with limited 3 D for newer cards. radeonhd An alternate driver support R520 hardware and later. This driver is now all but officially deprecated in favor of radeon. By default there is no configuration file (xorg.conf) for X anymore, so X will try to do the right thing. If you run into stability problems with 3 D applications using the radeon/radeonhd drivers, consider trying a more recent kernel. mainline- -lucid did the trick on a few machines. Installing Open Source Edge Drivers These packages are built regularly from the X. Org git repository, so they may not be fully stable. On Lucid, using this graphics stack now uses the r300g Gallium3 D driver for 3 D acceleration on Radeon R300- R500 ( Radeon 9500 - Radeon X1950) class chips. It's probably a good idea to use the linux kernel provided by this repo if you go this route. To install: $ sudo.
Remove the drivers.deb or normal install (if you get a file not found ignore it) sudo sh /usr/share/ati/fglrx-uninstall.sh sudo apt-get remove -purge fglrx fglrx fglrx-amdcccle* fglrx-dev* Remove your xorg.conf sudo rm /etc/ X11/xorg.conf Reinstall xorg sudo apt-get install -reinstall xserver-xorg-core libgl1-mesa-glx libgl1-mesa-dri libgl1-mesa-glx libgl1-mesa-dri Configure Xorg sudo dpkg-reconfigure xserver-xorg Reboot: sudo reboot After the reboot all the fglrx packages will be gone, you will be using default open source. For more information on how to remove / add / replace ATI drivers in your system there is already a very good post with these steps.
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