Can you also post you /var/log/Xorg.0.log and /var/log/Xorg.0.log.old? apport is supposed to collect those files, no idea why it didn't in this case.
Can you also post you /var/log/Xorg.0.log and /var/log/ Xorg.0. log.old? apport is supposed to collect those files, no idea why it didn't in this case.