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 6.1)
OpenGL vendor string: Mesa project: www.mesa3d.org
OpenGL renderer string: Mesa GLX Indirect
OpenGL version string: 1.2 (1.5 Mesa 6.1)
As you have probably guessed, it should read "ATI Technologies" for the vendor string.
Have you tried the new ATI Driver Installer which is now available on their website? (It was added only a few days ago)