premier@Deus-ex-Machina-4b:~$ fglrxinfo
Xlib:  extension "XFree86-DRI" missing on display ":0.0".
display: :0.0  screen: 0
OpenGL vendor string: Mesa project: www.mesa3d.org
OpenGL renderer string: Mesa GLX Indirect
OpenGL version string: 1.2 (1.5 Mesa 6.5.1)

premier@Deus-ex-Machina-4b:~$ dpkg -l | grep xorg-driver-fglrx
ii  xorg-driver-fglrx                          7.1.0-8.28.8+2.6.17.7-11.1           Video driver for ATI graphics accelerators
premier@Deus-ex-Machina-4b:~$ dpkg -l | grep libgl1-mesa-glx
ii  libgl1-mesa-glx                            6.5.1~20060817-0ubuntu3              A free implementation of the OpenGL API -- G
premier@Deus-ex-Machina-4b:~$ dpkg -l | grep libgl1-mesa-dri
ii  libgl1-mesa-dri                            6.5.1~20060817-0ubuntu3              A free implementation of the OpenGL API -- D
premier@Deus-ex-Machina-4b:~$