Ubuntu – Sound only comes in headphones doesn’t come out of the speakers on a HP Pavilion dv6 1280us

As ALC1200 and ALC888 seem to be very similar (see this German Wiki Entry) you can try my solution for the Intel HDA ALC1200 on my Acer Aspire 5920 G laptop. After upgrading to Ubuntu 12.04 Precise Pangolin from 11.10 my speakers continued to output the sound when plugging in headphones. In 11.10 the speakers were muted automatically when a headphone was plugged in.

I fixed it by adding a line to /etc/modprobe.d/alsa-base.conf :

options snd-hda-intel model=auto probe_mask=1

Now I've got a lot more options/controls when running alsamixer. One is "Auto-Mute Mode". Set this to "Enabled" if it does not work out of the box.

stehpan

You can change using System Settings->Sound->Output - just pick the device you want the sound to output on.