Comment 13 for bug 1252733

I'm using regular headphones, not an headset. I'm currently unable to test headsets, but in any case there should be no background noise with regular headphones.

I posted about this issue in the Dell forum and waiting for someone to answer, I expect some support from them since a variant of this laptop is sold with Ubuntu. If nobody answers, I'll try to let them know about this issue in some other way and I could also try to contact the author of the patch you posted.