I don't seem to find a core dump in either /etc/X11/core or in /var/crash/ so not sure how to get the backtrace. I followed the changes in https://wiki.ubuntu.com/DebuggingXorg, i.e.: changed the file /etc/default/apport to enabled=0
and added Section "ServerFlags" Option "NoTrapSignals" "true" EndSection to my xorg.conf I attach the Xorg.0.log.old The description of the problem is identical to wuddiwupp's thanks ** Attachment added: "Xorg.0.log.old" http://launchpadlibrarian.net/12696356/Xorg.0.log.old -- [HARDY] X crashes randomly (i915) https://bugs.launchpad.net/bugs/201352 You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs