My workstation has a built-in speaker that, surprisingly, plays audio very well. I also have external speakers hooked up to the audio out jack which are easier to hear. Unfortunately, when I try to play some audio material, sound comes out of both the external speakers and the built-in speaker on the workstation.
I'd like to disable the speaker inside the machine, and just plug in head-phones to the external speaker so I can listen to training material at work without bothering my office mate. I'm not sure how to do this in Linux (Suse Enterprise Desktop 11). Fiddling around with the Gnome audio tools doesn't list two different audio devices on the machine.
From what I can tell, sound is played through the ALSA system. I looked in my home directory and there is no .asoundrc controlling configuration.
I should also add that I check in the BIOS for a way to disable the built-in speaker, but I could not find such a setting.
Best Answer
You could open up the case and pull the plug connecting the internal speaker to the motherboard.