I find that when I mute or set the volume to zero using the mixer control in the top xfce4-panel, I cannot raise the volume again. It remains silent until I sign out and sign back in again using the default Ubuntu desktop (Unity, I believe). In the default desktop, I'll see that the volume is muted, and so I raise the volume here. Then it works here and when I sign back into my xfce4 desktop. It will keep working unless I mute it once again, at which point I have to go through the same steps that I've described. I try both the xfce4-mixer and alsa-mixer, but this does not work. The only thing that works is signing out and signing back in to the default desktop, which is tedious to do.

  • sounds like a bug - this may help (ubuntuforums.org/archive/index.php/t-2122906.html) - if it does, please post an answer and say exactly which bits worked for you. Thanks. – fossfreedom Nov 4 '14 at 22:20
  • 1
    Okay, I did sorta solve this. I installed gnome-alsa-mixer and with this I was unable to unmute the volume. Seems that the "headphone", "PCM", and "Speaker" were set to mute. When I tried to unmute these with the xfce4-mixer, it refused to unmute all three together, but I was able to do this with the gnome-alsa-mixer from within the xfce4 desktop. Odd, but at least I didn't have to sign out into a different desktop to do it. PS, thanks for your response fossfreedom. I'll have a look. – MarkGrieveson Nov 4 '14 at 22:23

Mine was on mute and I solved the issue doing this:

  1. open terminal
  2. type amixer -D pulse sset Master 5%+
  3. keep doing it until Left and right are at 100%

Alternatively, do this:

  1. open terminal
  2. type amixer -D pulse sset Master toggle

For some reason the xfce sound mixer doesn't work well with pulseaudio. I have found the following two commands helpfull.

run the following command to turn mute on:

pactl set-sink-mute 0 1

run the following command to turn mute off:

pactl set-sink-mute 0 0



I have each of these commands set to keyboard shortcuts. It may or may not solve this bug though.

amixer -D pulse sset Master 5%-
amixer -D pulse sset Master 5%+
amixer -D pulse sset Master toggle

The last one toggles between muted and not muted.

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