lspci | grep -i vga
01:00.0 VGA compatible controller: ATI Technologies Inc M24 1P [Radeon Mobility X600]

bobito@bobito-laptop:~$ fglrxinfo
display: :0.0  screen: 0
OpenGL vendor string: ATI Technologies Inc.
OpenGL renderer string: ATI MOBILITY RADEON X600
OpenGL version string: 2.0.6473 (8.37.6)