Hello, I've connected the front audio panel output for my headphones. I know that when doing so the rear speakers should be disabled automatically but in my case they still work. I hear the sound in both the front headphones and the back speakers in the same time. How can I fix the problem so when I plug the headphones in the sound of the speakers is disabled and only is activated after I unplug them? And also there is an annoying noise from the earphones when I plug them in even when not playing sound. (They're perfectly fine on stereo-systems so It's not a problem of the earphones but rather of the front audio connectors). * I have an Asus motherboard and I've configured AC'97 pin definition according to my manual. Thanks in advance for any suggestion.

"How can I fix the problem so when I plug the headphones in the sound of the speakers is disabled" How about simply turning off the speakers?

Of course I do that :) but the whole point is that the hardware should disable its rear speakers when headphones are pluges in. Like in your stereo system when you plug in your headphones you don't hear the sound on the speakers anymore but only with the headphones. I'm afraid that maybe I didn't configured the pins correctly or something.

"I know that when doing so the rear speakers should be disabled automatically but in my case they still work......How can I fix the problem so when I plug the headphones in the sound of the speakers is disabled and only is activated after I unplug them?" In almost all cases that's not possible with computer mboards. It would require either that the front panel jack be a special jack that disconnects the output to the jack the speaker is plugged into when headphones or speakers are plugged into the front jack - the wiring just isn't there, or some other oddball arrangement. However, in this case you may be able to have the situation you want, if you buy an additional piece. You have two front panel sound headers on the mboard. If you obtain a special High Defintion Audio front panel module (probably only available from Asus, or possibly from where the mboard was purchased) and connect that instead of the AC97 sound to the existing case jacks, according to the manual the High Definition Audio supports "Jack Sensing Technology". If you don't want to buy that piece, you have to make do by muting the sound to the speakers in your sound mixer when you don't want to have the speakers on if that and the headphone are controlled by separate channels, or by rigging up wiring and a switch between the sound port and the speakers so you can switch off the speakers with a physical switch. "..annoying noise from the earphones when I plug them in...." Do you also have a microphone plugged in, or a microphone in something such as a webcam? If you do, the annoying sound is probably feedback - you can also get that in the speakers if they are close to or face the microphone - you need to lessen the microphone volume in your sound mixer, or Mute it (in most cases whenever a program needs to use it, it will be un-muted automatically).

Thank you for the very elaborated answer. Yes, for now I'll probably have to mute the speakers in the sound mixer which is not so bad. I just thought that it's a motherboard problem or a problem in the connections. As for the earphones, the noise disappeared after restart.