Please, read my post #356. Your changes can work, but isn't the best method.
Originally Posted by xalatar
If something got wrong in video driver installation, you just need to delete xorg.conf file in /etc/X11/ and reboot
Originally Posted by Glutanimate
so, run this command:
sudo rm -f /etc/X11/xorg.conf
You probably is using wrong package for your architecture. If you are using Ubuntu 64 bits you should download 64bits packages (amd64, even for intel processors). If you are using Ubuntu x86 you must download x86 packages. Just try again fixing it.
Originally Posted by rohan koranga