Comment 20 for bug 253422

I was using 6stack-dig as a workaround the way i mentioned above. Now i use:
options snd-hda-intel model=targa-2ch-dig
(or targa-dig)
And it works the way it should! (the speakers mute when i plug headphones, and headphones work)
But i have to be sure that in the parameters of the HDA intel mixer "headphones" is checked.
My laptop is MSI, so it might not be the same fix for everybody..

http://www.mjmwired.net/kernel/Documentation/sound/alsa/ALSA-Configuration.txt
search for ALC883/888 and try different models.