This same thing happened to me but with alarm clock: https://bugs.launchpad.net/ubuntu/+source/unity8/+bug/1438036
(See comment #6) -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1442166 Title: Calendar alarms rings forever if Low Battery dialog visible To manage notifications about this bug go to: https://bugs.launchpad.net/canonical-devices-system-image/+bug/1442166/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs