Just installed F12 and noticed that the volume control applet is now all Pulseaudio rubbish, not Alsa like gmixer used to be.
So now I don't seem to be able to mute my speakers when I'm using my headset, which in F10 I could do by just muting LFE/Center.
Note I don't want the speakers to be disabled when I have the headphones plugged in (like Jack does) I just want to be able to control volume of the mixer channels individually - as sometimes I'll be playing music through the speakers and will receive a Skype call and want to mute the music, but also don't want the Skype sound coming out of the speakers - just the headphones.
I've tried setting up 4.1+input, 5.1+input, 4.0+input etc; but for some reason, even though the PulseAudio mixer thing has 5 individual sliders, they do nothing as they "jump" back to 100% when you slide them - even with the channels unlocked.
gmixer and alsamixer do the job, but pulseaudio is the applet and only seems to control the master volume, not the individual channels.
Any ideas - or perhaps a way to make gnome-volume-control revert back to actually being gmixer?