Why did you lose it? Do you remember changing anything? – slhckSep 23 '11 at 18:27
ooops ..followed Archwiki and made some changes to the modprobe and sound file..But still it;s not happening..must be missing some obvious...BTW I have four different disto running..physicall parition..namely Gentoo,Ferdora,Slackware and Debian along with Arch..all of them have same problem...with headphone all are good on – unixbhaskarSep 24 '11 at 7:12