I'm on Xubuntu 13.10 64 bit. I've recently had this issue. As a result the sliding bar that is used to control the volume is gone. I can live without it, I can control the volume from my keyboard but I'd like to know if I can install an alternative to the default sliding bar.
I have Xfce4 version 4.10. My volume indicator looks like this, I don't know what it's called, but it's the default one
Best Answer
It looks like you're not using the default Xfce volume slider (perhaps in Xubuntu it is default, but not in Xfce). I suspect that you're using the indicator plugin, which I don't like nor use. I would suggest that you try adding
Audio Mixer
plugin to the panel.To have it available you need to: