Comment 15 for bug 45318

I got the exact same problem on my ubuntu 6.06 amd64 system with a Radeon 7000 and "fixed" it by installing mesa-dri:

sudo apt-get install libgl1-mesa-dri

Then log out/log in and it works.

Probably some dependency is missing somewhere in the xorg/dri stuff.

glxinfo/glxgears now work but I still get errors like:
ref_gl version: GL 0.01
Using libGL.so.1 for OpenGL...Display initialization
..XFree86-VidMode Extension Version 2.2
..Got colorbits 24, depthbits 24, stencilbits 0
X Error of failed request: BadAlloc (insufficient resources for operation)
  Major opcode of failed request: 143 (GLX)
  Minor opcode of failed request: 3 (X_GLXCreateContext)
  Serial number of failed request: 23
  Current serial number in output stream: 26

from games like http://www.warsow.net/

(Note: I do not get FPS from glxgears, I wonder why and there is no man page for it too)