How to disable the internal speaker in Lucid

Pete Vander Giessen petevg at
Tue Jun 1 16:53:26 UTC 2010

On Tue, Jun 1, 2010 at 1:03 AM, Amichai Rotman <amichai at> wrote:
> Hi,
> I recently installed Ubuntu Lucid after using Kubuntu Hardy LTS for a long
> while (KDE 3.5.10).
> I am trying to disable sound output to my internal speaker.

I'm not in front of my desktop at the moment, so I can't verify, but
this might work (similar to what I did to fix the problem on my

1)  Click the volume control icon in your notification area, then
click "Sound Preferences" in the menu that drops down.
2)  Click over to the "Output" tab.
3)  There should be a dropdown menu at the bottom of this panel that
allows you to choose which jack you wish to output to.  If you choose
something like "Analog Output", that should get rid of sound in the
internal speaker, provided Gnome/Pulseaudio supports your hardware.

If that fails, Bill's solution of unplugging the speaker will
definitely work ;-)


" ... the original aphorism being 'In comparison with the ancients, we
stand like dwarfs on the shoulders of giants.' The image was a
commonplace by the time Newton used it, his one contribution being to
erase any sense that he himself might be a dwarf."

~ Lewis Hyde

> I have an HP DX2300 Mini Tower machine which has a full speaker on board.
> There isn't a way to disable it in the BIOS without disabling the entire
> on-board audio device, which I use.
> In Hardy I found a way to tick all output devices in Kmix and then dable the
> internal speaker.
> I can't find the same in the Gnome Sound Preferences. When I turn off the
> external speakers connected to the line out (green) plug of the on-board
> card, the internal speaker continues to output sound, actually it does all
> the time, but the external speakers mask it while on....
> This is really annoying. I am no stranger to the CLI, but I am not sure
> which .conf to change and where to look - I don't know PulseAudio that well.
> I tried to use alsamixer under CLI, but when I turned off all volume to PCM,
> the master volume was also affected....
> Help!
> Thanks!
> .:====================================================:.
> Amichai Rotman
> Registered Linux User#: 201192 []
> Registered Ubuntu User #12851 []
> ------------------------------------------------------------------------------------------------------------
> .:====================================================:.
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