Turns out it doesn't matter if the device is locked. Happens when unlocked too.
Could be this crash dump:- https://errors.ubuntu.com/oops/30d1fe4c- 12d1-11e6-8448-fa163ebeb28a ** Summary changed: - Crash when choosing "yes" to some popups when locked + Crash when choosing "yes" to some popups ** Also affects: sync-monitor (Ubuntu) Importance: Undecided Status: New -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1578601 Title: Crash when choosing "yes" to some popups To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/sync-monitor/+bug/1578601/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs