On Friday 08 October 2004 05:39, Kassem Nasser wrote:
> Hi all ,
> I am using currently Mandrake10.0 and I was trying to run an OpenGL
> program when I got the following error:
> Xlib:  extension "GLX" missing on display ":0.0"
> And by the way anybody knows any mailinglist specific for OpenGL.
> Can any body help me out
> Best Regards,

It means that the GLX module is not loaded.
There are a number of reasons why this might be.

1/ You are using a video driver that does not support GLX such as 'vesa'.

2/ You have a GLX capable video driver such as 'nv', but GLX is disabled in 
your /etc/X11/XF86Config-4 file  (Look to see if the line "Load glx" is 
commented out )

3/ You have GLX enabled but it is the wrong library. For example if you are 
using the closed source 'nvidia' driver you must also be using the Nvidia GLX 
module too.

What to do :-
Look at the log file /var/log/XFree86.0.log  it will tell you precisely which 
modules loaded and why anything failed.

Tell us which driver you are using. It will be listed in the 
file /etc/X11/XF86Config-4 in the "Device" section.  The glx module should be 
listed in the "module" section.

Tell us what video card you have.

derek

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