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Xorg server GLX problem in Debian squeeze

I have been a  Debian GNU/Linux user since 2007.

Since then, I experienced several major OS upgrades (dist-upgrade).
 But every time I dist-upgrade, some trouble annoyed me.

The most recent problem was related to the seting of Xorg server.

When starting up X server (from gdm3), the xserver process couldn't find the glx symbols.

In the /var/log/Xorg.0.log:
(EE) GLX error: Can not get required symbols.

This prevented Compiz Fusion window manager from working on the X desktop.

Although the hardware video driver was "intel", it seams that some extra glx code for Nvidia caused the trouble.


The following command fixed the problem:

 aptitude purge fglx-glx fglx-driver nvidia-vdpau-driver

(I don't know which package was actually problematic.)

If you have a glx related problem with the intel graphic controller chip, try removing unrelated packages that supposed be combined with nvidia or Radeon!
That save you some (small amount of ) disk spaces :-)

But I wander what to do when you have both intel on-board graphic controller and advanced graphic board of Nvidia or AMD...
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