MPRIS player properties are reported with initial values when retrieving them

[Simon Fels]

While playing a music track via the music-app

$ phablet@ubuntu-phablet:~$ gdbus call -e -d core.ubuntu.media.Service -o /org/mpris/MediaPlayer2 -m org.freedesktop.DBus.Properties.GetAll 'org.mpris.MediaPlayer2.Player'
({'AudioStreamRole': <int16 2>, 'CanControl': <true>, 'CanGoNext': <false>, 'CanGoPrevious': <false>, 'CanPause': <true>, 'CanPlay': <true>, 'CanSeek': <true>, 'Duration': <int64 0>, 'Lifetime': <int16 0>, 'LoopStatus': <'None'>, 'MaximumRate': <1.0>, 'MinimumRate': <1.0>, 'Orientation': <int16 0>, 'PlaybackRate': <1.0>, 'PlaybackStatus': <'Playing'>, 'Position': <int64 0>, 'Shuffle': <false>, 'TypedLoopStatus': <int16 0>, 'TypedPlaybackStatus': <int16 0>},)

Properties Position and Duration are zero but should have a value.

With

 $ dbus-monitor --session

I see the property Position being updated as the track is being played.

[Jim Hodapp (jhodapp)]

This is not critical in my opinion as it wasn't even noticed until Simon tried to manually retrieve these property values using the new bluetooth and MPRIS control integration. All other clients get these values via the *Changed signals which are definitely working at the moment.

[Launchpad Janitor (janitor)]

Status changed to 'Confirmed' because the bug affects multiple users.