

You may need to change the boot order in your BIOS to boot to your CD-ROM or USB port before your hard drive (see Resources).

Insert a LiveCD or a LiveUSB in your machine, and then boot to it. Sudo apt-get remove -purge xorg-driver-fglrx fglrx* sudo apt-get install -reinstall libgl1-mesa-glx libgl1-mesa-dri xserver-xorg-core sudo dpkg-reconfigure xserver-xorg LiveCD and LiveUSB
