Comment 3 for bug 580233

It does seem odd that a dell quirk would work for this model. This quirk can be found (along with a confirmation) on this launchpad answer:
https://answers.launchpad.net/ubuntu/+source/alsa-driver/+question/80818

Another possible choice given on that answer is:
alias snd-card-0 snd-hda-intel
alias sound-slot-0 snd-hda-intel
options snd-hda-intel model=hp-m4 enable_msi=1

Now what can be tested is the hp-m4 option. As well, we can check the source to see what the difference is between these the "dell-m4-1" model and the "hp-m4" model.