I recently bought a GeForce MX 4000 Graphics card and I really love it. I install the NVIDIA drivers in linux and it works wonderfully. Under glxinfo it reports that direct rendering works and all 3d is on.

My problem lies here. Sometimes when I restart X all of a sudden I lose all 3d and OpenGL. glxinfo reports no direct rendering and everything is slow. I've tried using the nvidia-xconfig and everything preinstalled to fix the problem. But to no avail it doesn't change I still have no 3d.

The only solution to the fix is to go back redownload the nvidia drivers, and reinstall them. I'm thankful that my problem has a easy temporary fix but I would rather just not have the problem. Does anybody have any suggestions? (Besides never restarting X.)

When you say you are restarting X, how are you restarting it and how long is it down? I haven't restarted X on my machine with a nvidia card in awhile, but I've noticed the same thing on my machine with an ati machine and the reason was because the hardware wasn't yet freed from the previous X session.

how did you free it from the previous session.

I restart X in two ways, I log out of kde in a regular situation and sometimes kde slows down so much a fresh restart of X helps. Sometimes I switch to a new terminal and killall X. neither case really makes a difference in whether the video card works or not. It's kind of a random problem. One interesting thing I've noticed however is that I now have been getting into the fade and drop shadow effects of kde. And it seems as soon as I started playing with that I have not lost my direct rendering in a while.