On 2015-04-13 22:50, Glenn Golden wrote: > So the question is: Is the state of "Master Playback Switch" that you referred > to in your response above indeed represented by the "MM/OO" display on the > ALSA Master Playback slider, as I've assumed? Your screenshot shows a virtual PulseAudio control. Try pressing F6 to select the real sound card, or start alsamixer with the "-c 0" switch (or "-c 1", in case "-c 0" is a HDMI card). Otherwise, you're correct. -- David Henningsson, Canonical Ltd. https://launchpad.net/~diwic