Originally Posted by konst
I don't use the nvidia glx. Never did. It has nothing to do with the problem.
Yes it does - NVIDIA GLX IS THE BINARY DRIVER. If this fails to load, X will instead fall back to software rendering and hence all rendering is done in the CPU, not the GPU, and that is why you have 95% CPU usage. Fix the driver to load correctly and this will fix your 95% CPU usage issue.