problems loading Xserver. Is Xserver needed to work with GPU?

Accelerated Computing CUDA CUDA Programming and Performance
1

Hi,

I installed OpenCL1.1 driver on a Fedora 14 machine, according to this post: How to install the nvidia driver in F12 using the run method
everything went fine and the driver seemed to have been installed successfully. However the last step from the post - glxinfo | grep -i opengl - produced an error.
Later I figured out, that Xserver 1.9 failed to load with the message:

[ 24.313] dlopen: /usr/lib/xorg/extra-modules/nvidia_drv.so: undefined symbol: WindowTable

  1. How can I fix it?
  2. Can I work(compile/run/debug) with OpenCL without having Xserver? (I do it anyway via ssh)…

thank you in advance