Turns out I had apport switched off on my device, hence no /var/crash files. Sorry about that. So I switched it back on and have a crash file (attached).
** Attachment added: "_usr_sbin_unity-system-compositor.0.crash" https://bugs.launchpad.net/ubuntu/+source/unity8/+bug/1542305/+attachment/4567897/+files/_usr_sbin_unity-system-compositor.0.crash -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1542305 Title: Pressing button on bluetooth game pad shuts unity down To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/unity8/+bug/1542305/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs