Russel Winder, could you attach /var/log/messages, /var/log/Xorg.0.log.old (after a crash), /var/log/Xorg.0.log, and the output of dmesg?
Russel Winder, could you attach /var/log/messages, /var/log/ Xorg.0. log.old (after a crash), /var/log/ Xorg.0. log, and the output of dmesg?