[pulseaudio-discuss] Media Keys on Bluetooth headsets?

[Lennart Poettering]

On Mon, 28.12.09 01:28, Matthew W. S. Bell (matthew at bells23.org.uk) wrote:

> On Mon, 2009-12-28 at 08:08 +0800, Ng Oon-Ee wrote:
> > Hi, I've been using my Jabra Halo stereo (A2DP) headset with pulse and
> > gnome-bluetooth for several months now, works great.
> > 
> > A question though, does pulseaudio or gnome-bluetooth (not sure who'd
> > be
> > responsible for this) support the media keys (next track, previous
> > track) on my headset, or on any bluetooth headset? I'd assume these
> > keys
> > are standard across headsets, since they all work on the same devices
> > (bluetooth mp3 or cellphones etc.)
> 
> The Linux kernel input layer is responsible for handling Bluetooth
> AVRCP. Whenever, an AVRCP device is connected an appropriate input event
> device should appear; one can use 'lsinput' to list input devices.
> 
> I believe that hald-addon-input then processes these events and emits
> DBUS 'ButtonPressed' events. In the case of GNOME, I believe these are
> then picked up by gnome-settings-daemon, and emitted as X key-presses.
> One can use 'dbus-monitor --session' to see the events.

In recent distros HAL is out of the game. The path is now bluetoothd →
uinput → X → gnome-settings-daemon → apps.

Lennart

-- 
Lennart Poettering                        Red Hat, Inc.
lennart [at] poettering [dot] net
http://0pointer.net/lennart/           GnuPG 0x1A015CC4