predator.hawk: as i mentioned in my post i have already tried alsamixer, rexima and kmix. nothing helped
...but there has been a bit of developement.
not in the form of sound being working fine but i have found that the on-board sound card i m using is actually C-Media 9739A which has the ICH5 chipset.
this card is known to have such problems and i found a reference here
the page there ^ talks about a dmix plugin but i don't know what that is and how to configure it. can someone please help me to find more info on it or tell me how i can configure it properly?
thanx for sticking with me till now.