suse10.1 sound configuration
 

While I'm playing music, I had headphone plugged to external speaker but the sound still come from external speaker and internal speaker from my Acer laptop. How do I configure to make it only sounds from the external speaker?

Have you tried alsamixer from the command line to mute the channel of the internal speaker?

ermm?
 

alsamixer? No, I didn't tried before. Can you teach me how do I mute the internal speaker from the terminal? What command I should type?

You just have to type
An interface will load, and you can adjust the volume for each channel. You just have to find the right channel for the internal speaker - just try them all till it's muted.

no use
 

I tried each one PCM, front, volume, line and so no.. but still the same coz only Front sound is working , if i mute it there's no more sound. what should i do?