>From reading the backtrace in comment 3, I'm guessing that Thread3 is the Qt >GUI thread, which is blocked on a WaitCondition. Thread 15 is a Mir thread, is blocked on SessionAuthorizer::requestAuthorizationForSession which is waiting for the Qt GUI thread to reply to it. But as GUI thread blocked, then it blocks Mir at that place.
But why Qt GUI thread blocked is open question. More detailed backtrace would help - I'd start installing qtdeclarative5-dbg and qtbase5-dbg. The dbus DENIED messages are interesting too -- You received this bug notification because you are a member of Ubuntu Touch seeded packages, which is subscribed to unity8 in Ubuntu. https://bugs.launchpad.net/bugs/1377332 Title: UI randomly freezes Status in “unity8” package in Ubuntu: Confirmed Bug description: Summary UI randomly freezes steps: 1. run long running random gestures test until freeze happens, doesn't happen every day. device info: [service] base: system-image.ubuntu.com http_port: 80 https_port: 443 channel: ubuntu-touch/ubuntu-rtm/14.09-proposed device: krillin build_number: 79 version_detail: ubuntu=20141002,device=20141002-d5938d7,custom=1412208099,version=79 To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/unity8/+bug/1377332/+subscriptions -- Mailing list: https://launchpad.net/~touch-packages Post to : [email protected] Unsubscribe : https://launchpad.net/~touch-packages More help : https://help.launchpad.net/ListHelp
