1) Ensure that the device is unplugged from power
2) Open the music app and start playing a set of tracks
3) Turn off the display
4) Wait until the first track ends and the second starts
5) Notice that the second track stops/stutters (like the wakelock isn't keeping the device awake)
6) Turn the display on, notice the audio starts playing as usual
7) Notice that the metadata is incorrect (it is the first track and not the second), only the source and position are correct. Turning the display off here again will stop the audio
I have also seen if you let the track EOS with the display on that the audio stops, doesn't go onto the next track, and the music-app still thinks it is playing - the app is then left in a broken state. This usually happens on the second EOS of the app.
When the track correctly EOS's with the display on, I have observed it play the same track over and over again (due to the background playlists work?)
$ system-image-cli -i
current build number: 181
device name: mako
channel: ubuntu-touch/devel-proposed-customized-here
alias: ubuntu-touch/vivid-proposed-customized-here
last update: 2015-04-26 17:27:16
version version: 181
version ubuntu: 20150424.1
version device: 20150210
version custom: mako-1.1
This is the media-hub log [0] when the following occurred
1) Started playing 06 - Ain’t It Fun
2) Turned off display waiting until track ended
3) It played the track again?!
4) Wait until the song ends
5) It played 07 - Part II
6) Wait until the song ends
7) It stopped playing anything and now the music app thinks it is playing but nothing being output, skipping/
0 - http://