I have an HP Pavillion HDX16, and prior to UP4 the dedicated touch-sensitive volume controls didn't work. Now they do, although with one quirky side effect: if I use the touch-sensitive mute button, the sound will mute but I can't unmute it with the same button; I have to go to Applications Menu > Multimedia > PulseAudio Volume Control and unmute it there. I can live with that, but I figured I'd share.
MikeC


