That one was possibly incorrectly marked as a duplicate. Because this bug shows a hang in an identical location to that of bug 1421308:
Compare comment #6 above with: https://bugs.launchpad.net/qtmir/+bug/1421308/comments/5 -- You received this bug notification because you are a member of Ubuntu Touch seeded packages, which is subscribed to mir in Ubuntu. https://bugs.launchpad.net/bugs/1436860 Title: unity8 is hung in SessionAuthorizer::requestAuthorizationForSession() Status in Mir: Invalid Status in Qt integration with the Mir display server: Confirmed Status in mir package in Ubuntu: Invalid Status in qtmir package in Ubuntu: Confirmed Bug description: I was running phablet-test-run ubuntuuitoolkit with the qt dbus patches that fix https://bugs.launchpad.net/ubuntu/+source/unity8/+bug/1421009 at some point the tests failed, i was left on screen with an application that is no longer running, and unity8 seems to be deadlocked Using mir 0.12.0+15.04.20150228-0ubuntu1 To manage notifications about this bug go to: https://bugs.launchpad.net/mir/+bug/1436860/+subscriptions -- Mailing list: https://launchpad.net/~touch-packages Post to : touch-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~touch-packages More help : https://help.launchpad.net/ListHelp