Comment 32 for bug 136837

(In reply to comment #1)
> I don't think that GTK is to blame for this; there is other brokenness in the
> mixer applet right now, e.g. the values dont' always go from 0 to 100, and
> the muting/unmuting happens semi-randomly when changing the level. This may
> be fallout from the switch from polling to notification.

I've fixed those bits, should be in 1:2.20.0-2. The problem also exists upstream
(without the notification patch) when changing the volume fast, some calls to
alsa-lib fail, but we don't know that. So we ignore the failed gets/sets and
just use the value that's in the UI.

The obvious problem is that the hardware and the UI might get out of sync, but
that's better than the UI going bananas and the mute state switching all over
the place. I filed http://bugzilla.gnome.org/show_bug.cgi?id=478498 against
GStreamer, and http://bugzilla.gnome.org/show_bug.cgi?id=478485 against the applet.

Let me know how the new build works for you. Should be at:
http://koji.fedoraproject.org/koji/taskinfo?taskID=166805