This is happening to me on 16.04.2 ... and yes, locking/unlocking screen is a workaround. Restarting the panel doesn't help.
-- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1351982 Title: top panel and launcher are unresponsive To manage notifications about this bug go to: https://bugs.launchpad.net/unity/+bug/1351982/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
