I have cleaned out my kernel packages and now I only have the official trusty kernel package installed. So I'm running on kernel 3.13 now and I've just experienced this crash again.
This time I was looking at Google maps on Chrome, so nothing special really going on (except maybe if Google maps is using some hardware acceleration similar to the ones that the Euphoria screensaver is using). But as I said, I'm now running on the official kernel so I'm re- uploading the Xorg log file. ➜ ~ uname -a Linux hyperion-stfs 3.13.0-92-generic #139-Ubuntu SMP Tue Jun 28 20:42:26 UTC 2016 x86_64 x86_64 x86_64 GNU/Linux ** Attachment added: "xorg_crash_20160728_xorg.log" https://bugs.launchpad.net/ubuntu/+source/xorg/+bug/1598904/+attachment/4708817/+files/xorg_crash_20160728_xorg.log ** Changed in: xorg (Ubuntu) Status: Incomplete => New -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1598904 Title: X server crashes sporadically with a segfault To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/xorg/+bug/1598904/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs