You got it right. now video is fast. thanks. but why did you reinstall the o.s.?
I went through the same problem, i just did a kernel upgrade in text mode then re adjusted the kernel. also i deleted the nvidia.o driver and then did an upgrade install from the cd's to fix x. it took a long time to fix but i didn't lose my infromation. you hit the nail right on the head by installing NVIDIA_GLX
instead of upgrading it. thanks again.