Please attach your /var/log/Xorg.0.log. It would also be useful to have a full backtrace on this issue - please see http://wiki.ubuntu.com/X/Backtracing.
Please attach your /var/log/ Xorg.0. log. wiki.ubuntu. com/X/Backtraci ng.
It would also be useful to have a full backtrace on this issue - please see http://