Comment 6 for bug 298868

Thanks for the backtrace Philippe. This indicates what function the crash occurred, however doesn't give us much in the way of state. The crashes are definitely happening in xserver code rather than in the driver, which is good in a way since we may have a chance at solving it, but it would be helpful to have the additional information a full backtrace would provide. Could you please install the dbg packages for xserver, reproduce the crash in gdb, and collect a 'backtrace full'? See http://wiki.ubuntu.com/X/Backtracing for more guidance.