constant buzzing noise from speaker when headphones are plugged in Ubuntu 13.04

I'm using Lenovo Y410p. After I plug in the headphones, there's constant buzzing noise from speaker. If I unplug them, the noise disappears.

If I disable "Auto-Mute Mode" through alsamixer, the noise disappeared immediately while the headphones are stilled plugged in. And the noise came back immediately if I enable "Auto-Mute Mode". But this is not a good solution because the feature of auto switching to headphones or speaker is gone.

Btw, my problem is similar to this one except that the noise remains whether playing music or not.

Thank you very much!

this happened to me.

I stops it by going into the sound settings and turning the Skype volume to 0. I was trying to watch a Youtube video at the time and the buzzing was occurring.

you might have a program interfering with the audio your trying to listen to.

Also have a Y410p and was having the same issue. Opening alsamixer and setting Auto-Mute Mode to disabled fixed it for me.