How to mute internal speakers, not headphones?

[Daniel T. Chen]

On Fri, 2007-03-09 at 19:01 -0800, Charlie Zender wrote:
> 0: SigmaTel STAC9200

The code for this HDA codec is under heavy revision currently. You'll
likely need to pass model=ref to the driver, then unload and reload the
alsa drivers (or simply reboot).

echo options snd-hda-intel model=ref | sudo tee
-a /etc/modprobe.d/alsa-base

> 00:1b.0 0403: 8086:27d8 (rev 01)
>          Subsystem: 1028:01cd

Thanks,
Daniel Chen