Note in the duplicate bug #1203593 the stacktrace from apport doesn't match the crash; from the Xorg.0.log the crash would be in sna_accel_flush_callback().
Can you please make sure you run "apt-get install xdiagnose" and attach all logs if this reoccurs. ** Changed in: xserver-xorg-video-intel (Ubuntu) Status: New => Incomplete -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1203273 Title: Xorg crashed with SIGABRT in has_offload_slaves() To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/xserver-xorg-video-intel/+bug/1203273/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs