Comment 1 for bug 517794

Thank you for taking the time to report this bug and helping to make Ubuntu better. Unfortunately, we can't fix it because your description didn't include enough information. You may find it helpful to read "How to report bugs effectively" http://www.chiark.greenend.org.uk/~sgtatham/bugs.html. We'd be grateful if you would then provide a more complete description of the problem.

We have instructions on debugging some types of problems at http://wiki.ubuntu.com/DebuggingProcedures

Could you please provide the following logs:
/var/log/messages
/var/log/Xorg.0.log
the output of lspci and lsusb might also be useful.

Also, you need to state which release you are using, and if possible; try and recreate the bug in the latest development release.

Thanks!