Comment 42 for bug 253422

I've got the same problem here on my laptop: an msi s271
Running Intrepid with the latest kernel.
There is sound coming from the speakers and my headphone, but the speakers aren't muted when i plug the headphone in.

http://www.alsa-project.org/db/?f=533495de41c479144402879c8d2decc31ec1a137

Adding model=targa-2ch-dig at the end of /etc/modprobe.d/alsa-base unfortunatly doesn't seem to solve the problem. :(