[Alsa-user] Problem to Switch between outputs of a soundcard

[Stefano G. <ste...@ep...>]

Hello everybody,
I've got a sound card which is integrated into my mainboard. Sound works 
good using hda-intel module with alsa.
My problem is :
I've got 2 outputs connected to the main board : One 5.1 on the back of 
my tower and an other one with only one jack on the front. I'd like the 
sound to switch off of the back output when I plug my headset in the 
front, and then reswitch on as soon as I've removed the jack on the front.
At the moment I can't even find how to configure alsa to be able to do 
it manually (I mean, I didn't find the way to mute the 5.1 without 
muting the front output)

Does anybody have an idea about how I could solve this problem? I asked 
on a couple of forums but everybody redirected me to this mailling..

Thanks a lot

P.S:
Interesting par of lspci :
00:1b.0 Audio device: Intel Corporation 82801G (ICH7 Family) High 
Definition Audio Controller (rev 01)