Mmmm, I'll investigate it a bit later
this is the output of a verbose boot, for pcm1:
pcm1: <Realtek ALC255 (Analog 2.0+HP/2.0)> at nid 20,33 and 18 on hdaa1
pcm1: Playback:
pcm1: Stream cap: 0x00000001 PCM
pcm1: PCM cap: 0x000e0060 16 20 24 bits, 44 48 KHz
pcm1: DAC: 2
pcm1:
pcm1: nid=20 [pin: Speaker (Fixed)]
pcm1: + <- nid=12 [audio mixer] [src: pcm, speaker]
pcm1: + <- nid=2 [audio output] [src: pcm]
pcm1: + <- nid=11 [audio mixer] [src: speaker]
pcm1: + <- nid=29 [beep widget] [src: speaker]
pcm1:
pcm1: nid=33 [pin: Headphones (Black Jack)]
pcm1: + <- nid=12 [audio mixer] [src: pcm, speaker]
pcm1: + <- nid=2 [audio output] [src: pcm]
pcm1: + <- nid=11 [audio mixer] [src: speaker]
pcm1: + <- nid=29 [beep widget] [src: speaker]
pcm1:
pcm1: Record:
pcm1: Stream cap: 0x00000001 PCM
pcm1: PCM cap: 0x000e0560 16 20 24 bits, 44 48 96 192 KHz
pcm1: ADC: 8
pcm1:
pcm1: nid=8 [audio input]
pcm1: + <- nid=35 [audio mixer] [src: speaker, monitor]
pcm1: + <- nid=29 [beep widget] [src: speaker]
pcm1: + <- nid=11 [audio mixer] [src: speaker]
pcm1: + <- nid=29 [beep widget] [src: speaker]
pcm1: + <- nid=18 [pin: Mic (Fixed)] [src: monitor]
pcm1:
pcm1: Master Volume (OSS: vol): -65/0dB
pcm1: +- ctl 1 (nid 2 out): -65/0dB (88 steps)
pcm1: +- ctl 10 (nid 12 in 0): mute
pcm1: +- ctl 11 (nid 12 in 1): mute
pcm1: +- ctl 16 (nid 20 in ): mute
pcm1: +- ctl 23 (nid 33 in ): mute
pcm1:
pcm1: PCM Volume (OSS: pcm): -65/0dB
pcm1: +- ctl 1 (nid 2 out): -65/0dB (88 steps)
pcm1: +- ctl 10 (nid 12 in 0): mute
pcm1:
pcm1: Microphone2 Volume (OSS: monitor): 0/30dB
pcm1: +- ctl 15 (nid 18 out): 0/30dB (4 steps)
pcm1: +- ctl 36 (nid 35 in 6): mute
pcm1:
pcm1: Speaker/Beep Volume (OSS: speaker): -34/12dB
pcm1: +- ctl 9 (nid 11 in 4): -34/12dB (32 steps) + mute
pcm1: +- ctl 11 (nid 12 in 1): mute
pcm1: +- ctl 34 (nid 35 in 4): mute
pcm1: +- ctl 35 (nid 35 in 5): mute
pcm1:
pcm1: Recording Level (OSS: rec): -17/30dB
pcm1: +- ctl 3 (nid 8 in 0): -17/30dB (64 steps) + mute
pcm1: +- ctl 15 (nid 18 out): 0/30dB (4 steps)
pcm1: +- ctl 34 (nid 35 in 4): mute
pcm1: +- ctl 35 (nid 35 in 5): mute
pcm1: +- ctl 36 (nid 35 in 6): mute
pcm1:
pcm1: Input Monitoring Level (OSS: igain): 0/0dB
pcm1: +- ctl 11 (nid 12 in 1): mute
pcm1:
pcm1: Mixer "vol":
pcm1: Mixer "pcm":
pcm1: Mixer "speaker":
pcm1: Mixer "rec":
pcm1: Mixer "igain":
pcm1: Mixer "ogain":
pcm1: Mixer "monitor":
pcm1: Playback channel set is: Front Left, Front Right,
pcm1: Playback channel matrix is: 2.0 (unknown)
pcm1: Automatically set rec source to: monitor
pcm1: Recording channel set is: Front Left, Front Right,
pcm1: Recording channel matrix is: 2.0 (unknown)