Comment 4 for bug 1595288

The app starts to stop while the screen goes black...so I rebooted the phone then impossible to restart the app. I've check .lock file but could find it.

The music app log
Loading module: 'libubuntu_application_api_touch_mirclient.so.3.0.0'
/usr/lib/arm-linux-gnueabihf/qt5/bin/qmlscene: unrecognized option '--url='
/usr/lib/arm-linux-gnueabihf/qt5/bin/qmlscene: invalid option -- 'I'
could not retrieve client config: "An AppArmor policy prevents this sender from sending this message to this recipient; type="method_call", sender=":1.103" (uid=32011 pid=18167 comm="/usr/lib/arm-linux-gnueabihf/qt5/bin/qmlscene app/") interface="com.canonical.Thumbnailer" member="ClientConfig" error name="(unset)" requested_reply="0" destination="com.canonical.Thumbnailer" (uid=32011 pid=18242 comm="/usr/lib/arm-linux-gnueabihf/thumbnailer/thumbnail")" (using default values)
virtual QMediaService* AalServicePlugin::create(const QString&) "org.qt-project.qt.mediaplayer"
[TT 2016-06-29 18:56:59.579803] [service.cpp:29@instance]
Failed to start a new media-hub player session: org.freedesktop.DBus.Error.ServiceUnknown: The name core.ubuntu.media.Service was not provided by any .service files
Failed to create a new media player backend. Video playback will not function.

Could not finish contructing new AalMediaPlayerService instance since m_hubPlayerSession is NULL
QNetworkManagerInterface::QNetworkManagerInterface(QObject*) propsReply "An AppArmor policy prevents this sender from sending this message to this recipient; type="method_call", sender=":1.119" (uid=32011 pid=18167 comm="/usr/lib/arm-linux-gnueabihf/qt5/bin/qmlscene app/") interface="org.freedesktop.DBus.Properties" member="GetAll" error name="(unset)" requested_reply="0" destination="org.freedesktop.NetworkManager" (uid=0 pid=1781 comm="NetworkManager ")"
QNetworkManagerInterface::QNetworkManagerInterface(QObject*) nmReply "An AppArmor policy prevents this sender from sending this message to this recipient; type="method_call", sender=":1.119" (uid=32011 pid=18167 comm="/usr/lib/arm-linux-gnueabihf/qt5/bin/qmlscene app/") interface="org.freedesktop.NetworkManager" member="GetDevices" error name="(unset)" requested_reply="0" destination="org.freedesktop.NetworkManager" (uid=0 pid=1781 comm="NetworkManager ")"
"Object path cannot be empty"
virtual bool QMediaPlaylist::setMediaObject(QMediaObject*)
void QDeclarativeAudio::setPlaylist(QDeclarativePlaylist*)
could not open containers config file "/home/phablet/.local/share/libertine/ContainersConfig.json"
virtual void QDeclarativeAudio::componentComplete()
virtual void QDeclarativeAudio::componentComplete() - Calling setMedia
void QMediaPlayer::setMedia(const QMediaContent&, QIODevice*)
void QMediaPlayerPrivate::setPlaylist(QMediaPlaylist*)
void QMediaPlayerPrivate::setPlaylist(QMediaPlaylist*) - playlist->mediaCount(): 0
virtual bool QMediaPlaylist::setMediaObject(QMediaObject*)
void QMediaPlaylistPrivate::syncControls(QMediaPlaylistControl*, QMediaPlaylistControl*)
Track list doesn't exist so can't clear it!
virtual void AalMediaPlaylistControl::setPlaybackMode(QMediaPlaylist::PlaybackMode)
PlaybackMode: Loop