Comment 8 for bug 580233

ditto here

i have a hp dv6 2128 el and i was getting sound from both loudspeaker and headphones after plugging them into the audio jack,
James' quirck worked.

alias snd-card-0 snd-hda-intel
options snd-hda-intel model=dell-m4-1 enable_msi=1

in
/etc/modprobe.d/alsa-base.conf
did the trick

*** i did not try the other line in James' quirck
alias sound-slot-0 snd-hda-intel
option.

here is my alsa-info
http://www.alsa-project.org/db/?f=610effcd72a1d1073e25aa05c13bf5e9940c4aaf