How to disable the internal speaker in Lucid

NoOp glgxg at
Tue Jun 1 19:29:49 UTC 2010

On 06/01/2010 01:03 AM, Amichai Rotman 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 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....


$ sudo apt-get install gnome-alsamixer

Note: that package is in the Universe repositories, so ensure that you
have those enabled.

Then Applications|Sound Gnome ALSA Mixer. That hopefully will give you
the tick box that you need to turn off the internal speaker.

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