troubleshooting hdaudio on Intel NUC

[Ben Collver <bencollver%riseup.net@localhost>]

Greetings,

I installed NetBSD/amd64 10.1 on an Intel NUC.  I have headphones
plugged into the front panel. Also, my HDMI monitor has built-in
speakers.  When i play audio in palemoon, the audio comes from my
monitor.  The `audiocfg list` command shows that the default is the
Realtek chipset, which corresponds to my headphones, not the monitor.

`autiocfg test 0` produces silence from the headphones.
`audiocfg test 1` produces audio from the monitor.

Below are the output of audiocfg, mixerctl, and excerpts from
dmesg.

Any ideas why i get no audio from the "HP Out" jack?

Thanks!
-Ben

$ audiocfg list
0: [*] audio0 @ hdafg0: Realtek product 0283
       playback: 2ch, 48000Hz
       record:   2ch, 48000Hz
       (P-) slinear_le 16/16, 2ch, { 44100, 48000, 96000, 192000 }
       (P-) slinear_le 20/32, 2ch, { 44100, 48000, 96000, 192000 }
       (P-) slinear_le 24/32, 2ch, { 44100, 48000, 96000, 192000 }
       (  ) ac3 16/16, 2ch, { 44100, 48000, 96000, 192000 }
       (PR) slinear_le 16/16, 2ch, 48000-48000Hz
1: [ ] audio1 @ hdafg1: Intel HDMI/DP
       playback: 2ch, 48000Hz
       record:   2ch, 48000Hz
       (P-) slinear_le 16/16, 2ch, { 48000 }
       (P-) slinear_le 16/16, 4ch, { 48000 }
       (P-) slinear_le 16/16, 6ch, { 48000 }
       (P-) slinear_le 16/16, 8ch, { 48000 }
       (PR) slinear_le 16/16, 2ch, 48000-48000Hz

$ mixerctl -av -d /dev/mixer0 
outputs.master=254,254 volume delta=2
outputs.master2=128,128 volume delta=256
outputs.master2.mute=off  [ off on ]
outputs.master3=128,128 volume delta=256
outputs.master3.mute=off  [ off on ]
outputs.dacsel=DAC00  { DAC00 }

$ mixerctl -av -d /dev/mixer1 
outputs.master=128,128 volume delta=256
outputs.master.mute=off  [ off on ]
outputs.dacsel=DP00  { DP00 }

$ dmesg
...
[     1.025705] hdafg0 at hdaudio0: Realtek product 0283
[     1.025705] hdafg0: DAC00 2ch: HP Out [Jack]
[     1.025705] hdafg0: 2ch/0ch 44100Hz 48000Hz 96000Hz 192000Hz PCM16 PCM20 PCM24 AC3
[     1.025705] audio0 at hdafg0: playback, capture, full duplex, independent
...
[     1.025705] hdafg1 at hdaudio0: Intel HDMI/DP
[     1.025705] hdafg1: DP00 8ch: Digital Out [Jack]
[     1.025705] hdafg1: 8ch/0ch 48000Hz PCM16*
[     1.025705] audio1 at hdafg1: playback, capture, full duplex, independent