[alsa-devel] Keyboard volume buttons

[Lennart Poettering]

On Fri, 27.02.09 08:06, Vedran Miletić (rivanvx at gmail.com) wrote:

> On Fri, Feb 27, 2009 at 3:20 AM, Harsha, Priya <priya.harsha at intel.com> wrote:
> > Hi,
> >
> > Can anyone tell me how keyboard's volume buttons are converted into real volume change? Will there be an application that monitors the keyboard volume button events and call ALSA API to set the volume?
> >
> > Thanks
> > Harsha
> >
> > _______________________________________________
> > Alsa-devel mailing list
> > Alsa-devel at alsa-project.org
> > http://mailman.alsa-project.org/mailman/listinfo/alsa-devel
> >
> 
> Yes, X catches keypress and lets the window manager know about it. In
> case of metacity, which is what GNOME uses, if that key is bound to a
> volume control action, it calls gnome-volume-control to do the
> apropriate change. I _believe_ it is so, never checked source code.

It is actually not the window manager.

In GNOME it is a little daemon that runs in the session and is called
gnome-settings-daemon. It does a lot of little thinks, one of them
handling volume key events and showing a nice OSD for it.

Lennart

-- 
Lennart Poettering                        Red Hat, Inc.
lennart [at] poettering [dot] net         ICQ# 11060553
http://0pointer.net/lennart/           GnuPG 0x1A015CC4