I know there are a lot of questions like this here, but I tried them all and I couldn't make them work.
I have a HP dv6-2190ep laptop.
My sound card is HDA Intel IDT 92HD75B3X5.
My Ubuntu is 13.04.
I tried to add options on
alsa-base.conf but I still don't have auto mute option.
I'm completely changing to Ubuntu from Windows and it is important to fix this. I'm around this for about 1 month.