Could one of you run a little experiment for me? Here's what I need:
Load the sound drivers. Unplug headphones, toggle off the headphone button in alsamixer and type "cat /proc/asound/card0/codec#0 > without-headphones.codec". Next, plug in your headphones, toggle the headphone button and type "cat /proc/asound/card0/codec#0 > with-headphones.codec". Send me both files.
The only info I have shows the headphone jack as muted, but I want to verify that it changes state when the button is toggled.