$ dpkg --get-selections | grep xorg
xorg-driver-fglrx                               install
xserver-xorg                                    install
xserver-xorg-core                               install
xserver-xorg-driver-ati                         install
xserver-xorg-input-kbd                          install
xserver-xorg-input-mouse                        install
xserver-xorg-input-synaptics                    install