Sound problem in sony vaio vgn-fz15g has problem. sound driver is ok but if i connect headphone the sound comes from both speaker and headphone pls help me to solve this problem

Ok me too, since i install the win 7 in my sony vgn-fz15g, the sound is also coming from speaker too while headphone is connected, and earlier in vista it disable the speaker automatically, i check the sound window, in win7 speaker/headphone is given together, i can not disable one at a time, i think its a driver problem, sony customer care people told me that they have still not tested this model on windows 7 so thats why they are not releasing the driver, if any one have the link for he latest sigmatel high definition driver then let me know that, because this is the complete problem

This is a web page link to the Sony Customer support web page for the notebook model VIO VGN-FZ15G. On this web page is all the service information for you model notebook computer.The page also contains a pdf copy of the owners manual. This information should help you with the problem of the headphone and speakers playing at the sametime. If not you can contact customer support on this web page and ask them for assistance with the problem. I hope this information helps you solve your problem. Thank you for using FixYa and have a nice day! http://www.sony-asia.com/support/product/vgn-fz15g/modelfirst

Your proablem is not clear. i thik your computer '.s speaker is in mute . so go on control panel and check setting. then u can solve. if not hardwere( speaker) may be damage.

Normally when you connect a headphone to the headphone socket it disables the speaker. There is a contact on the headphone socket that disconnects the audio lead to the speakers when you plug in a headphone.
From your discription this headphone socket is partially faulty and the contact doesn't disconnect the speaker.
The only way to fix it is to replace the headphone socket. It may not be cheap fix because you need to dismantle the laptop to get at this socket.