Comment 1 for bug 337917

Actually it's probably the -nvidia driver's fault, in which case there's probably not much that Ubuntu can do.

Can you ssh into the box after experiencing the error? If not, then it's a kernel fault and should be filed against 'linux'.

If you can ssh into it, then try collecting a backtrace. See http://wiki.ubuntu.com/X/Backtracing for guidance. Since -nvidia is a closed source driver, the backtrace will probably be useless, but if it isn't nvidia it might give some clues.

Try reproducing it on Jaunty. If it still occurs there, then change the package from nvidia-graphics-drivers-177 to nvidia-graphics-drivers-180, because -177 is obsolete and we'll be closing its bugs out in a week or so.