Sound appears of my speakers also when headphones are connected in
I had the very same concern. It shows up that the new bit did not appropriately identify the sound card version that you have. You will certainly need to modify the
/etc/modprobe.d/alsa-base.conf documents and also set the version by hand with
options snd-hda-intel model=<model>
Unfortunately, locating the proper sound card version can take a little hunch job. I took me numerous searches for the sound card version that would certainly identify the headphones appropriately.
This link offers a checklist of sound card version : http://ubuntuforums.org/showthread.php?t=1043568
More details can be located on the Ubuntu Wiki.