Comment 5 for bug 205979

Looks like it is crashing in Xkb. Do you have any other keyboards you could test with, to see if it occurs with them as well? Or test that keyboard with a different computer running Ubuntu Hardy? Perhaps it is something particular to that model of keyboard.

Also, please install the debug packages for X server, and get a full backtrace (see https://wiki.ubuntu.com/DebuggingXorg for directions).