Music app does not react to bluetooth headset buttons

The device is BQ Aquaris E4.5 Ubuntu Edition.

Could you try using the attached click package?

It gives this error:
Cannot install com.ubuntu.music_2.0.851_all.click: Signature verification error: debsig: Origin Signature check failed. This deb might not be signed.

Can you try to install the click package on the device using "pkcon install-local --allow-untrusted com.ubuntu.music_2.0.851_all.click"?

This way it installed, but now the music player does not show the artists, albums, etc, it's just empty.

After uninstalling and reinstalling, it now works like originally, but the remote control with bluetooth does not.

Thanks, Akos! The bluetooth media keys are certainly something we have on our roadmap to get working with the app.

How can I determine that the headset connected with both A2DP and AVRCP profiles, or just with A2DP?

It shows up as /dev/input/event5, so it definitely connects with both profiles.

I can confirm this too with Samsung HS6000 headset; I'm here and willing to help in any way to make this work.

Half a year passed. Any progress? (Still doesn't work for me)

We are currently working with the platform on background-playlist support [0], this allows for the indicator-sound and other parts of the platform to control the music-app's queue. Therefore once this support lands it will be possible for mediakeys (and bluetooth controls) to correctly control the music-app.

Sorry its taken us such a long time, its a rather large item with work needed upstream to the music-app as well.

0 - https://code.launchpad.net/~music-app-dev/music-app/media-hub-bg-playlists-rework

Possible duplicate of Bug #1398193 - The bluetooth headset can not control the media playback

More than one and a half year passed, and this basic functionality is still not working not even on the very first phone released officially with ubuntu. I feel like canonical has no quality control at all :(
Is anybody working on this?

The music app transitioned to using "background playlists" a while back, which allows for the system to control the playback/next/previous etc. So all that is left is for the system side, media-hub and bluez, to be linked so that when a bluetooth headset button is pressed it instructs media-hub to perform the action. The tracking of this particular feature is now in bug 1398193, therefore I am marking this bug as a duplicate.