Multimedia keys have no effect on Banshee in Ubuntu 16.04

[Nathan Laville]

Banshee doesn't repond anymore to multimedia keys in Ubuntu 16.04 with Unity or Gnome-Flashback

Expected :
In ubuntu 14.04, running Unity or Gnome-Flashback, I could use the multimedia keys I had defined globally in ubuntu (In System Parameters -> Keyboards -> Shortcuts, Sound & Multimedia)
to stop, pause, go to the next track, etc. whenever the banshee application was visible or not.

But in ubuntu 16.04, the multimedia keys have no effect at all on banshee (within Unity or Gnome-Flashback).
I have checked that the related extension "multimedia keys" is well actived.

To go further, the log confirms twice that the extension `Banshee.MultimediaKeys.MultimediaKeysService' fails to work because of a missing GNOME Settings Daemon (whereas this doesn't occur in 16.04).
(see hereafer)

[Info 20:39:26.017] Running Banshee 2.6.2: [Ubuntu 16.04 LTS (linux-gnu, x86_64) @ 2016-04-18 13:50:09 UTC]
[...]
[Warn 20:39:33.522] Caught an exception - System.ApplicationException: No support GNOME Settings Daemon could be reached. (in `Banshee.MultimediaKeys')
  at Banshee.MultimediaKeys.MultimediaKeysService.Banshee.ServiceStack.IExtensionService.Initialize () <0x4025f1d0 + 0x0037f> in <filename unknown>:0
  at Banshee.ServiceStack.ServiceManager.StartExtension (Mono.Addins.TypeExtensionNode node) <0x4024fa70 + 0x00169> in <filename unknown>:0
[Warn 20:39:33.529] Extension `Banshee.MultimediaKeys.MultimediaKeysService' not started: No support GNOME Settings Daemon could be reached.
[...]

[Launchpad Janitor (janitor)]

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

[carega (crlsmuoz5)]

I found a workaround for this issue here: https://community.linuxmint.com/tutorial/view/1275

[Chow Loong Jin (hyperair)]

It works in GNOME Shell (and the code for this plugin hasn't changed in years), so I think it's related to the way unity uses its own settings daemon that isn't quite the same as gnome-settings-daemon.