On Wed, Jul 4, 2012 at 8:49 PM, Erich Dollansky
<erichfreebsdl...@ovitrap.com> wrote:
> Hi,
>
> there have been some people here - including me - wondering whether the head 
> phone jack works. Yes, it does.
>
> I just have had the chance to connect the head phone jack. It works when vlc 
> is set to use /dev/dsp1.0.
>
> Using /dev/dsp0.1 brings sound to the built-in speakers.

The "proper" fix is to add the following to /boot/loader.conf:
# Out : speaker + headphones
hint.hdac.0.cad0.nid25.config="as=1 seq=15"
# In : mic + external mic
hint.hdac.0.cad0.nid35.config="as=2"
hint.hdac.0.cad0.nid27.config="as=2 seq=15"

This will make the mic work for headsets that have a mic and will make
the headphones DTRT so that audio is sent to the headphones and the
speakers are muted when headphones are plugged in.
NOTE: This works on the T520, but the X220 seems to be very similar in
most every way I have seen.
--
R. Kevin Oberman, Network Engineer
E-mail: kob6...@gmail.com
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