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At some point my OpenGL stopped working in Kubuntu 12.04. "glxinfo" reports Xlib: extension "GLX" missing on display ":0". I know it worked previously since I was using before, even developing for it, so there must be some update to blame. I just want to know how to fix it.

I've looked through several other questions/searches and mostly they deal with problems with Nvidia. I have a Radeon card, and I'm not using the binary drivers (I strictly use the supported drivers). Thus I'm at a loss as to what the problem is.


In my XOrg.0.log I find the below line, just after it finds all the Radeon stuff. Why is it attempting to use the NVidia driver (I don't have it installed).

(EE) Failed to initialize GLX extension (Compatible NVIDIA X driver not found)

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Something must have installed the 'nvidia-common' package which enables the NVidia check. Trying to remove that package you are asked to also remove a kubuntu desktop package. This is safe since that package is just a historical remnant and not needed. Once I got this removed, I restarted and everything is fine again.

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