The bluetooth headset cannot control media playback (AVRCP)

[Ricardo Salveti]

[Preconditions]
1.The DUT pair with bluetooth headset

[Procedures]
1.Play a video using the mediaplayer-app
2.Play/pause video by bluetooth headset

[Expect results]
The bluetooth headset can play/pause video
[Actual results]
The bluetooth headset can not control the video playback.

[Reproduce]
Always

Same for audio playback

[Launchpad Janitor (janitor)]

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

[Simon Fels (morphis)]

Nothing we have to change on media-hub just need to enable bluez to forward those events to media-hub. Will come with bluez5.

[Simon Fels (morphis)]

First changes for this landed in the touch images but still a bit buggy. Needs further work.

[Gregory Opera (gregoryopera)]

Tested using...
AfterShokz Trekz Titanium

bq Aquaris E5 HD Ubuntu Edition:
* OS build number: OTA-9
* Ubuntu Image part: 20160123.1
* Ubuntu build description: Ubuntu 15.04 - armhf (20160123-115651)
* Device Image part: 20160108-efc96d8
* Device build description: VEGETA01A-S23A_BQ_L100EN_2009_160123
* Customization Image part: 20160111-926-36--vivid

The result is the same - the "Multifunction" button is unable to pause or resume playback.

[Konrad Zapałowicz (kzapalowicz)]

I observed a similar issue with music playback, i.e. I'm unable to play/pause/ff/rev the music from the remote accessory.

[Simon Fels (morphis)]

Possible related to https://bugs.launchpad.net/ubuntu/+source/indicator-sound/+bug/1538703

[Konrad Zapałowicz (kzapalowicz)]

Just a quick test has revealed that the media key presses are captured on the receiving side:

bluetoothd[887]: profiles/audio/media.c:previous()
bluetoothd[887]: profiles/audio/media.c:next()

bluetoothd[887]: profiles/audio/avctp.c:handle_panel_passthrough() AV/C: REWIND pressed
bluetoothd[887]: profiles/audio/avctp.c:handle_panel_passthrough() AV/C: REWIND released

bluetoothd[887]: profiles/audio/avctp.c:handle_panel_passthrough() AV/C: FAST FORWARD pressed
bluetoothd[887]: profiles/audio/avctp.c:handle_panel_passthrough() AV/C: FAST FORWARD released

bluetoothd[887]: profiles/audio/media.c:pause()
bluetoothd[887]: profiles/audio/media.c:play()

[Konrad Zapałowicz (kzapalowicz)]

After receiving the media key event BlueZ sends in over the DBus to the media player. However there are no entries in the captured DBus log that would show the evidence of calling the Play, Pause, Next, Previous methods:

That should look like:

method call sender=:1.123 -> dest=core.ubuntu.media.Service serial=390 path=/core/ubuntu/media/Service/sessions/3; interface=org.mpris.MediaPlayer2.Player; member=ACTION

where ACTION should stand for Play, Pause, Next, Previous

We know that:
1. the player is registered

bluetoothd[887]: Player registered: sender=:1.28 path=/_1_48

This means that:
1. the player does not allow control
2. the player does not allow play, pause, next, previous

[Alexey Kulik (doctor-rover)]

There is at least one more important functionality of AVRCP missing in Ubuntu Touch right now besides play/pause/stop/next/previous. It is transmitting metadata information on the track (artist, track name, album, etc.) to the connected bluetooth device. For example, many car multimedia systems support this feature. It seems to be quite important for drivers.

[Michal Predotka (mpredotka)]

@doctor-rover I believe that's a different issue and deserves a separate bug report.

[Michael Zanetti (mzanetti)]

I have tracked this down to mpris-proxy not being able to connect to media-hub because of GetProperties seemingly being broken in media-hub. Once this is fixed, I think both, controls and metadata should start working. See bug 1596330 for more details.

[Alexey Kulik (doctor-rover)]

@mpredotka, @mzanetti, thanks for the prompt responses!

> Once this is fixed, I think both, controls and metadata should start working.
Great! Looking forward to that :)
Do I get it right that this means no need for a separate bug ticket?

[fabrice (lorthios-fabrice-t)]

it would be great if this bug was treated

[Gregory Opera (gregoryopera)]

When using AfterShokz's Trekz Titanium, the result is still the same... This issue still has not been addressed.

--

bq Aquaris E5 HD Ubuntu Edition:
* OS build number: OTA-13
* Ubuntu Image part: 20160913
* Ubuntu build description: Ubuntu 15.04 - armhf (20160913-023544)
* Device Image part: 20160606-540a47f
* Device build description: VEGETA01A-S23A_BQ_L100EN_2015_160913
* Customization Image part: 20160831-991-38-18

[Daniel van Vugt (vanvugt)]

Reduced priority for Ubuntu Touch bugs.

[Daniel van Vugt (vanvugt)]

Ubuntu Touch is no longer supported.