problem with my AC97 audio integrated

[Davide Lemma]

 Goomorning, this is my last resource... because I've tried everything to 
make working my AC97 integrated audio...

 let's start from beginning... I've a laptop (Medion SIM2000) very nice... 
the onboard sound is an AC97 (SiS7012),
 the card is well known by my system (5.3STABLE) but no sound comes out from 
speakers... just from headphone :(
 while in windows is works in the right way... the strange thing is that if 
I don't load the snd_ich module the speaker works... it makes beep and so on 
when I put something like echo cde >/dev/speaker, but when I load the 
snd_ich module speakers are muted :( of course they work with headphone 
inserted :) where is the trick here??
 is it a driver problem even if I don't think this is the problem?? perhaps 
a registry to manipulate output way ?? I really don't know... I've searched 
around and tried to apply a patch to it because I've heard about inverted 
JACK SENSE... but nothing worked 4 me... please give me a chance...

 thanx in advance, bye
 Davide