media-hub gets easily confused and hangs (needs reboot)

[Michael Zanetti]

Install "animal farm" from the store and use it for a bit. after a few attempts it will stop working. The device needs to be rebooted then in order for any multimedia using media-hub to start working again.

[Jean-Baptiste Lallement (jibel)]

Confirmed on
current build number: 360
device name: arale
channel: ubuntu-touch/rc-proposed/meizu.en

[Jean-Baptiste Lallement (jibel)]

crash on errors.u.c https://errors.ubuntu.com/oops/d375942a-3c60-11e6-9224-fa163ebeb28a

[Jean-Baptiste Lallement (jibel)]

crash reproduced on krillin/stable too

[Jim Hodapp (jhodapp)]

Verified, pretty easy to reproduce, and produced a log and gdb backtrace for it:

http://pastebin.ubuntu.com/18047059/

[Jim Hodapp (jhodapp)]

Another backtrace, this one is more interesting:

http://pastebin.ubuntu.com/18049795/

[Jim Hodapp (jhodapp)]

And another one...this one seemed to lock up right away after pressing a few of the animal buttons rapidly right after starting the app:

http://pastebin.ubuntu.com/18051685/

[Michał Sawicz (saviq)]

Here's a trace from media-hub-server locked up after screenshotting

[Michał Sawicz (saviq)]

And a bit more - all threads

[Pat McGowan (pat-mcgowan)]

Fix in silo 36 wfm

[Łukasz Zemczak (sil2100)]

This bug was fixed in the package media-hub 4.2.0+15.04.20160705-0ubuntu1 in https://launchpad.net/~ci-train-ppa-service/+archive/ubuntu/stable-phone-overlay

---------------

media-hub (4.2.0+15.04.20160705-0ubuntu1) vivid; urgency=medium

  [ Jim Hodapp ]
  * To avoid deadlocking, make sure that we don't ever change the
    pipeline's state on the streaming thread. It will always be set from
    the main thread context thanks to g_idle_add(). The deadlock that
    this fixes was when calling stop() in player_implementation.cpp in
    the on_end_of_tracklist() handler. (LP: #1596329)

 -- Łukasz Zemczak <email address hidden> Tue, 05 Jul 2016 14:58:25 +0000

[Launchpad Janitor (janitor)]

This bug was fixed in the package media-hub - 4.2.0+16.10.20160705-0ubuntu1

---------------
media-hub (4.2.0+16.10.20160705-0ubuntu1) yakkety; urgency=medium

  [ Jim Hodapp ]
  * To avoid deadlocking, make sure that we don't ever change the
    pipeline's state on the streaming thread. It will always be set from
    the main thread context thanks to g_idle_add(). The deadlock that
    this fixes was when calling stop() in player_implementation.cpp in
    the on_end_of_tracklist() handler. (LP: #1596329)

 -- Łukasz Zemczak <email address hidden> Tue, 05 Jul 2016 14:58:25 +0000