[alsa-devel] HDA Intel ALC889A optical optical spdif in

René Rebe rene at exactcode.de
Fri Apr 21 19:22:16 CEST 2017


On Apr 21, 2017, at 18:37, René Rebe <rene at exactcode.de> wrote:

> Hello again,
> 
> so I checked the MacBook schematics and it looks like the optical input should be directly connected to pin 47 (GPIO3/SPDIFIN)
> 
> Maybe EAPD get’s accidentally / wrongly enabled? - Maybe someone can point me how to double check this in ALSA?

I the meantime I finally figured out how this debug verb setting should work via:

# hda-verb /dev/snd/hwC0D0 0x14 0x70C 0
nid = 0x14, verb = 0x70c, param = 0x0
value = 0x0
# hda-verb /dev/snd/hwC0D0 0x15 0x70C 0
nid = 0x15, verb = 0x70c, param = 0x0
value = 0x0

which made no difference either, and the ALC889 spec reads “when pin
widget  SPDIF-IN is not connected via the programming configuration
register.”

Could that be a missing bit?

Any pointer or verbs I should poke welcome :-/

	René

> For the record - I try to record:
> # arecord -D iec958 -f dat -c 2 > rec.wav
> Recording WAVE 'stdin' : Signed 16 bit Little Endian, Rate 48000 Hz, Stereo
> 
> but only get zeros:
> 
> # hexdump  rec.wav 
> 0000000 4952 4646 0024 8000 4157 4556 6d66 2074
> 0000010 0010 0000 0001 0002 bb80 0000 ee00 0002
> 0000020 0004 0010 6164 6174 0000 8000 0000 0000
> 0000030 0000 0000 0000 0000 0000 0000 0000 0000
> *
> 0304020 0000 0000 0000 0000 0000 0000          
> 030402c
> 
> As far as I can see the right sub-device is running:
> 
> # cat /proc/asound/card0/pcm1c/info 
> card: 0
> device: 1
> subdevice: 0
> stream: CAPTURE
> id: ALC889A Digital
> name: ALC889A Digital
> subname: subdevice #0
> class: 0
> subclass: 0
> subdevices_count: 1
> subdevices_avail: 0
> bash-4.2# cat /proc/asound/card0/pcm1c/sub0/status 
> state: RUNNING
> owner_pid   : 25617
> trigger_time: 2735.340360836
> tstamp      : 0.000000000
> delay       : 3415
> avail       : 3415
> avail_max   : 4095
> -----
> hw_ptr      : 2047320
> appl_ptr    : 2043905
> 
> 
> # cat /proc/asound/card0/codec#0 
> Codec: Realtek ALC889A
> Address: 0
> AFG Function Id: 0x1 (unsol 1)
> Vendor Id: 0x10ec0885
> Subsystem Id: 0x106b2c00
> Revision Id: 0x100103
> No Modem Function Group found
> Default PCM:
>    rates [0x560]: 44100 48000 96000 192000
>    bits [0xe]: 16 20 24
>    formats [0x1]: PCM
> Default Amp-In caps: N/A
> Default Amp-Out caps: N/A
> State of AFG node 0x01:
>  Power states:  D0 D1 D2 D3
>  Power: setting=D0, actual=D0
> GPIO: io=2, o=0, i=0, unsolicited=1, wake=0
>  IO[0]: enable=1, dir=1, wake=0, sticky=0, data=1, unsol=0
>  IO[1]: enable=0, dir=0, wake=0, sticky=0, data=0, unsol=0
> Node 0x02 [Audio Output] wcaps 0x11: Stereo
>  Device: name="ALC889A Analog", type="Audio", device=0
>  Converter: stream=0, channel=0
>  PCM:
>    rates [0x560]: 44100 48000 96000 192000
>    bits [0xe]: 16 20 24
>    formats [0x1]: PCM
> Node 0x03 [Audio Output] wcaps 0x11: Stereo
>  Converter: stream=0, channel=0
>  PCM:
>    rates [0x560]: 44100 48000 96000 192000
>    bits [0xe]: 16 20 24
>    formats [0x1]: PCM
> Node 0x04 [Audio Output] wcaps 0x11: Stereo
>  Converter: stream=0, channel=0
>  PCM:
>    rates [0x560]: 44100 48000 96000 192000
>    bits [0xe]: 16 20 24
>    formats [0x1]: PCM
> Node 0x05 [Audio Output] wcaps 0x11: Stereo
>  Converter: stream=0, channel=0
>  PCM:
>    rates [0x560]: 44100 48000 96000 192000
>    bits [0xe]: 16 20 24
>    formats [0x1]: PCM
> Node 0x06 [Audio Output] wcaps 0x211: Stereo Digital
>  Control: name="IEC958 Playback Con Mask", index=0, device=0
>  Control: name="IEC958 Playback Pro Mask", index=0, device=0
>  Control: name="IEC958 Playback Default", index=0, device=0
>  Control: name="IEC958 Playback Switch", index=0, device=0
>  Control: name="IEC958 Default PCM Playback Switch", index=0, device=0
>  Device: name="ALC889A Digital", type="SPDIF", device=1
>  Converter: stream=0, channel=0
>  Digital: Enabled
>  Digital category: 0x0
>  IEC Coding Type: 0x0
>  PCM:
>    rates [0x5e0]: 44100 48000 88200 96000 192000
>    bits [0x1e]: 16 20 24 32
>    formats [0x1]: PCM
> Node 0x07 [Audio Input] wcaps 0x10011b: Stereo Amp-In
>  Control: name="Capture Volume", index=0, device=0
>    ControlAmp: chs=3, dir=In, idx=0, ofs=0
>  Control: name="Capture Switch", index=0, device=0
>    ControlAmp: chs=3, dir=In, idx=0, ofs=0
>  Device: name="ALC889A Analog", type="Audio", device=0
>  Amp-In caps: ofs=0x10, nsteps=0x2e, stepsize=0x03, mute=1
>  Amp-In vals:  [0x10 0x10]
>  Converter: stream=0, channel=0
>  SDI-Select: 0
>  PCM:
>    rates [0x560]: 44100 48000 96000 192000
>    bits [0xe]: 16 20 24
>    formats [0x1]: PCM
>  Connection: 1
>     0x24
> Node 0x08 [Audio Input] wcaps 0x10011b: Stereo Amp-In
>  Control: name="Capture Volume", index=1, device=0
>    ControlAmp: chs=3, dir=In, idx=0, ofs=0
>  Control: name="Capture Switch", index=1, device=0
>    ControlAmp: chs=3, dir=In, idx=0, ofs=0
>  Device: name="ALC889A Alt Analog", type="Audio", device=2
>  Amp-In caps: ofs=0x10, nsteps=0x2e, stepsize=0x03, mute=1
>  Amp-In vals:  [0x90 0x90]
>  Converter: stream=0, channel=0
>  SDI-Select: 0
>  PCM:
>    rates [0x560]: 44100 48000 96000 192000
>    bits [0xe]: 16 20 24
>    formats [0x1]: PCM
>  Connection: 1
>     0x23
> Node 0x09 [Audio Input] wcaps 0x10011b: Stereo Amp-In
>  Control: name="Capture Volume", index=2, device=0
>    ControlAmp: chs=3, dir=In, idx=0, ofs=0
>  Control: name="Capture Switch", index=2, device=0
>    ControlAmp: chs=3, dir=In, idx=0, ofs=0
>  Amp-In caps: ofs=0x10, nsteps=0x2e, stepsize=0x03, mute=1
>  Amp-In vals:  [0x90 0x90]
>  Converter: stream=0, channel=0
>  SDI-Select: 0
>  PCM:
>    rates [0x560]: 44100 48000 96000 192000
>    bits [0xe]: 16 20 24
>    formats [0x1]: PCM
>  Connection: 1
>     0x22
> Node 0x0a [Audio Input] wcaps 0x100391: Stereo Digital
>  Control: name="IEC958 Capture Switch", index=0, device=0
>  Control: name="IEC958 Capture Default", index=0, device=0
>  Device: name="ALC889A Digital", type="SPDIF", device=1
>  Converter: stream=1, channel=0
>  SDI-Select: 0
>  Digital: Enabled
>  Digital category: 0x0
>  IEC Coding Type: 0x0
>  PCM:
>    rates [0x560]: 44100 48000 96000 192000
>    bits [0x1e]: 16 20 24 32
>    formats [0x1]: PCM
>  Unsolicited: tag=00, enabled=0
>  Connection: 1
>     0x1f
> Node 0x0b [Audio Mixer] wcaps 0x20010b: Stereo Amp-In
>  Control: name="Mic Playback Volume", index=0, device=0
>    ControlAmp: chs=3, dir=In, idx=0, ofs=0
>  Control: name="Mic Playback Switch", index=0, device=0
>    ControlAmp: chs=3, dir=In, idx=0, ofs=0
>  Control: name="Line Playback Volume", index=0, device=0
>    ControlAmp: chs=3, dir=In, idx=2, ofs=0
>  Control: name="Line Playback Switch", index=0, device=0
>    ControlAmp: chs=3, dir=In, idx=2, ofs=0
>  Amp-In caps: ofs=0x17, nsteps=0x1f, stepsize=0x05, mute=1
>  Amp-In vals:  [0x80 0x80] [0x80 0x80] [0x80 0x80] [0x80 0x80] [0x80 0x80] [0x80 0x80] [0x80 0x80] [0x80 0x80] [0x80 0x80] [0x80 0x80]
>  Connection: 10
>     0x18 0x19 0x1a 0x1b 0x1c 0x1d 0x14 0x15 0x16 0x17
> Node 0x0c [Audio Mixer] wcaps 0x20010f: Stereo Amp-In Amp-Out
>  Control: name="Headphone Playback Volume", index=0, device=0
>    ControlAmp: chs=3, dir=Out, idx=0, ofs=0
>  Amp-In caps: ofs=0x00, nsteps=0x00, stepsize=0x00, mute=1
>  Amp-In vals:  [0x00 0x00] [0x80 0x80]
>  Amp-Out caps: ofs=0x40, nsteps=0x40, stepsize=0x03, mute=0
>  Amp-Out vals:  [0x34 0x34]
>  Connection: 2
>     0x02 0x0b
> Node 0x0d [Audio Mixer] wcaps 0x20010f: Stereo Amp-In Amp-Out
>  Control: name="Speaker Playback Volume", index=0, device=0
>    ControlAmp: chs=3, dir=Out, idx=0, ofs=0
>  Amp-In caps: ofs=0x00, nsteps=0x00, stepsize=0x00, mute=1
>  Amp-In vals:  [0x00 0x00] [0x80 0x80]
>  Amp-Out caps: ofs=0x40, nsteps=0x40, stepsize=0x03, mute=0
>  Amp-Out vals:  [0x34 0x34]
>  Connection: 2
>     0x03 0x0b
> Node 0x0e [Audio Mixer] wcaps 0x20010f: Stereo Amp-In Amp-Out
>  Amp-In caps: ofs=0x00, nsteps=0x00, stepsize=0x00, mute=1
>  Amp-In vals:  [0x00 0x00] [0x80 0x80]
>  Amp-Out caps: ofs=0x40, nsteps=0x40, stepsize=0x03, mute=0
>  Amp-Out vals:  [0x40 0x40]
>  Connection: 2
>     0x04 0x0b
> Node 0x0f [Audio Mixer] wcaps 0x20010f: Stereo Amp-In Amp-Out
>  Amp-In caps: ofs=0x00, nsteps=0x00, stepsize=0x00, mute=1
>  Amp-In vals:  [0x00 0x00] [0x80 0x80]
>  Amp-Out caps: ofs=0x40, nsteps=0x40, stepsize=0x03, mute=0
>  Amp-Out vals:  [0x40 0x40]
>  Connection: 2
>     0x05 0x0b
> Node 0x10 [Vendor Defined Widget] wcaps 0xf00000: Mono
> Node 0x11 [Vendor Defined Widget] wcaps 0xf00000: Mono
> Node 0x12 [Vendor Defined Widget] wcaps 0xf00000: Mono
> Node 0x13 [Vendor Defined Widget] wcaps 0xf00000: Mono
> Node 0x14 [Pin Complex] wcaps 0x40018f: Stereo Amp-In Amp-Out
>  Control: name="Speaker Playback Switch", index=0, device=0
>    ControlAmp: chs=3, dir=Out, idx=0, ofs=0
>  Amp-In caps: ofs=0x00, nsteps=0x03, stepsize=0x27, mute=0
>  Amp-In vals:  [0x00 0x00]
>  Amp-Out caps: ofs=0x00, nsteps=0x00, stepsize=0x00, mute=1
>  Amp-Out vals:  [0x00 0x00]
>  Pincap 0x0000373c: IN OUT HP Detect
>    Vref caps: HIZ 50 GRD 80 100
>  Pin Default 0x90100140: [Fixed] Speaker at Int N/A
>    Conn = Unknown, Color = Unknown
>    DefAssociation = 0x4, Sequence = 0x0
>    Misc = NO_PRESENCE
>  Pin-ctls: 0x40: OUT VREF_HIZ
>  Unsolicited: tag=00, enabled=0
>  Connection: 5
>     0x0c 0x0d* 0x0e 0x0f 0x26
> Node 0x15 [Pin Complex] wcaps 0x40018f: Stereo Amp-In Amp-Out
>  Control: name="Headphone Playback Switch", index=0, device=0
>    ControlAmp: chs=3, dir=Out, idx=0, ofs=0
>  Amp-In caps: ofs=0x00, nsteps=0x03, stepsize=0x27, mute=0
>  Amp-In vals:  [0x00 0x00]
>  Amp-Out caps: ofs=0x00, nsteps=0x00, stepsize=0x00, mute=1
>  Amp-Out vals:  [0x00 0x00]
>  Pincap 0x0000373c: IN OUT HP Detect
>    Vref caps: HIZ 50 GRD 80 100
>  Pin Default 0x012b4050: [Jack] HP Out at Ext Rear
>    Conn = Comb, Color = Green
>    DefAssociation = 0x5, Sequence = 0x0
>  Pin-ctls: 0xc4: OUT HP VREF_80
>  Unsolicited: tag=01, enabled=1
>  Connection: 5
>     0x0c* 0x0d 0x0e 0x0f 0x26
> Node 0x16 [Pin Complex] wcaps 0x40018f: Stereo Amp-In Amp-Out
>  Amp-In caps: ofs=0x00, nsteps=0x03, stepsize=0x27, mute=0
>  Amp-In vals:  [0x00 0x00]
>  Amp-Out caps: ofs=0x00, nsteps=0x00, stepsize=0x00, mute=1
>  Amp-Out vals:  [0x80 0x80]
>  Pincap 0x0000003c: IN OUT HP Detect
>  Pin Default 0x400000f0: [N/A] Line Out at Ext N/A
>    Conn = Unknown, Color = Unknown
>    DefAssociation = 0xf, Sequence = 0x0
>  Pin-ctls: 0x20: IN
>  Unsolicited: tag=00, enabled=0
>  Connection: 5
>     0x0c 0x0d 0x0e* 0x0f 0x26
> Node 0x17 [Pin Complex] wcaps 0x40018f: Stereo Amp-In Amp-Out
>  Amp-In caps: ofs=0x00, nsteps=0x03, stepsize=0x27, mute=0
>  Amp-In vals:  [0x00 0x00]
>  Amp-Out caps: ofs=0x00, nsteps=0x00, stepsize=0x00, mute=1
>  Amp-Out vals:  [0x80 0x80]
>  Pincap 0x0000003c: IN OUT HP Detect
>  Pin Default 0x400000f0: [N/A] Line Out at Ext N/A
>    Conn = Unknown, Color = Unknown
>    DefAssociation = 0xf, Sequence = 0x0
>  Pin-ctls: 0x20: IN
>  Unsolicited: tag=00, enabled=0
>  Connection: 5
>     0x0c 0x0d 0x0e 0x0f* 0x26
> Node 0x18 [Pin Complex] wcaps 0x40018f: Stereo Amp-In Amp-Out
>  Control: name="Mic Boost Volume", index=0, device=0
>    ControlAmp: chs=3, dir=In, idx=0, ofs=0
>  Amp-In caps: ofs=0x00, nsteps=0x03, stepsize=0x27, mute=0
>  Amp-In vals:  [0x00 0x00]
>  Amp-Out caps: ofs=0x00, nsteps=0x00, stepsize=0x00, mute=1
>  Amp-Out vals:  [0x80 0x80]
>  Pincap 0x0000373c: IN OUT HP Detect
>    Vref caps: HIZ 50 GRD 80 100
>  Pin Default 0x90a00110: [Fixed] Mic at Int N/A
>    Conn = Unknown, Color = Unknown
>    DefAssociation = 0x1, Sequence = 0x0
>    Misc = NO_PRESENCE
>  Pin-ctls: 0x24: IN VREF_80
>  Unsolicited: tag=00, enabled=0
>  Connection: 5
>     0x0c* 0x0d 0x0e 0x0f 0x26
> Node 0x19 [Pin Complex] wcaps 0x40018f: Stereo Amp-In Amp-Out
>  Amp-In caps: ofs=0x00, nsteps=0x03, stepsize=0x27, mute=0
>  Amp-In vals:  [0x00 0x00]
>  Amp-Out caps: ofs=0x00, nsteps=0x00, stepsize=0x00, mute=1
>  Amp-Out vals:  [0x80 0x80]
>  Pincap 0x0000373c: IN OUT HP Detect
>    Vref caps: HIZ 50 GRD 80 100
>  Pin Default 0x400000f0: [N/A] Line Out at Ext N/A
>    Conn = Unknown, Color = Unknown
>    DefAssociation = 0xf, Sequence = 0x0
>  Pin-ctls: 0x20: IN VREF_HIZ
>  Unsolicited: tag=00, enabled=0
>  Connection: 5
>     0x0c* 0x0d 0x0e 0x0f 0x26
> Node 0x1a [Pin Complex] wcaps 0x40018f: Stereo Amp-In Amp-Out
>  Control: name="Line Boost Volume", index=0, device=0
>    ControlAmp: chs=3, dir=In, idx=0, ofs=0
>  Amp-In caps: ofs=0x00, nsteps=0x03, stepsize=0x27, mute=0
>  Amp-In vals:  [0x00 0x00]
>  Amp-Out caps: ofs=0x00, nsteps=0x00, stepsize=0x00, mute=1
>  Amp-Out vals:  [0x80 0x80]
>  Pincap 0x0000373c: IN OUT HP Detect
>    Vref caps: HIZ 50 GRD 80 100
>  Pin Default 0x018b3020: [Jack] Line In at Ext Rear
>    Conn = Comb, Color = Blue
>    DefAssociation = 0x2, Sequence = 0x0
>  Pin-ctls: 0x20: IN VREF_HIZ
>  Unsolicited: tag=03, enabled=1
>  Connection: 5
>     0x0c* 0x0d 0x0e 0x0f 0x26
> Node 0x1b [Pin Complex] wcaps 0x40018f: Stereo Amp-In Amp-Out
>  Amp-In caps: ofs=0x00, nsteps=0x03, stepsize=0x27, mute=0
>  Amp-In vals:  [0x00 0x00]
>  Amp-Out caps: ofs=0x00, nsteps=0x00, stepsize=0x00, mute=1
>  Amp-Out vals:  [0x80 0x80]
>  Pincap 0x0000373c: IN OUT HP Detect
>    Vref caps: HIZ 50 GRD 80 100
>  Pin Default 0x400000f0: [N/A] Line Out at Ext N/A
>    Conn = Unknown, Color = Unknown
>    DefAssociation = 0xf, Sequence = 0x0
>  Pin-ctls: 0x20: IN VREF_HIZ
>  Unsolicited: tag=00, enabled=0
>  Connection: 5
>     0x0c* 0x0d 0x0e 0x0f 0x26
> Node 0x1c [Pin Complex] wcaps 0x400001: Stereo
>  Pincap 0x00000020: IN
>  Pin Default 0x400000f0: [N/A] Line Out at Ext N/A
>    Conn = Unknown, Color = Unknown
>    DefAssociation = 0xf, Sequence = 0x0
>  Pin-ctls: 0x20: IN
> Node 0x1d [Pin Complex] wcaps 0x400000: Mono
>  Pincap 0x00000020: IN
>  Pin Default 0x400000f0: [N/A] Line Out at Ext N/A
>    Conn = Unknown, Color = Unknown
>    DefAssociation = 0xf, Sequence = 0x0
>  Pin-ctls: 0x20: IN
> Node 0x1e [Pin Complex] wcaps 0x400300: Mono Digital
>  Pincap 0x00000010: OUT
>  Pin Default 0x014be060: [Jack] SPDIF Out at Ext Rear
>    Conn = Comb, Color = White
>    DefAssociation = 0x6, Sequence = 0x0
>  Pin-ctls: 0x40: OUT
>  Connection: 1
>     0x06
> Node 0x1f [Pin Complex] wcaps 0x400200: Mono Digital
>  Pincap 0x00000020: IN
>  Pin Default 0x01cbe030: [Jack] SPDIF In at Ext Rear
>    Conn = Comb, Color = White
>    DefAssociation = 0x3, Sequence = 0x0
>  Pin-ctls: 0x20: IN
> Node 0x20 [Vendor Defined Widget] wcaps 0xf00040: Mono
>  Processing caps: benign=0, ncoeff=17
> Node 0x21 [Volume Knob Widget] wcaps 0x600080: Mono
>  Volume-Knob: delta=0, steps=32, direct=0, val=63
>  Unsolicited: tag=00, enabled=0
>  Connection: 0
> Node 0x22 [Audio Mixer] wcaps 0x20010b: Stereo Amp-In
>  Amp-In caps: ofs=0x00, nsteps=0x00, stepsize=0x00, mute=1
>  Amp-In vals:  [0x00 0x00] [0x80 0x80] [0x80 0x80] [0x80 0x80] [0x80 0x80] [0x80 0x80] [0x80 0x80] [0x80 0x80] [0x80 0x80] [0x80 0x80] [0x80 0x80]
>  Connection: 11
>     0x18 0x19 0x1a 0x1b 0x1c 0x1d 0x14 0x15 0x16 0x17 0x0b
> Node 0x23 [Audio Mixer] wcaps 0x20010b: Stereo Amp-In
>  Amp-In caps: ofs=0x00, nsteps=0x00, stepsize=0x00, mute=1
>  Amp-In vals:  [0x80 0x80] [0x80 0x80] [0x00 0x00] [0x80 0x80] [0x80 0x80] [0x80 0x80] [0x80 0x80] [0x80 0x80] [0x80 0x80] [0x80 0x80] [0x80 0x80]
>  Connection: 11
>     0x18 0x19 0x1a 0x1b 0x1c 0x1d 0x14 0x15 0x16 0x17 0x0b
> Node 0x24 [Audio Mixer] wcaps 0x20010b: Stereo Amp-In
>  Amp-In caps: ofs=0x00, nsteps=0x00, stepsize=0x00, mute=1
>  Amp-In vals:  [0x00 0x00] [0x80 0x80] [0x80 0x80] [0x80 0x80] [0x80 0x80] [0x80 0x80] [0x80 0x80] [0x80 0x80] [0x80 0x80] [0x80 0x80] [0x80 0x80]
>  Connection: 11
>     0x18 0x19 0x1a 0x1b 0x1c 0x1d 0x14 0x15 0x16 0x17 0x0b
> Node 0x25 [Audio Output] wcaps 0x11: Stereo
>  Converter: stream=0, channel=0
>  PCM:
>    rates [0x560]: 44100 48000 96000 192000
>    bits [0xe]: 16 20 24
>    formats [0x1]: PCM
> Node 0x26 [Audio Mixer] wcaps 0x20010f: Stereo Amp-In Amp-Out
>  Amp-In caps: ofs=0x00, nsteps=0x00, stepsize=0x00, mute=1
>  Amp-In vals:  [0x00 0x00] [0x80 0x80]
>  Amp-Out caps: ofs=0x40, nsteps=0x40, stepsize=0x03, mute=0
>  Amp-Out vals:  [0x40 0x40]
>  Connection: 2
>     0x25 0x0b
> 
> On Apr 5, 2017, at 0:02, René Rebe <rene at exactcode.de> wrote:
> 
>> Hi,
>> 
>> recently I wanted to connect my low noise mic pre-amp via optical spdif to a spare "10 year” old MacBook or MacBookPro.
>> Those indeed have a optical input in the 3.5mm headphone jack. On macOS this also works and works as expected.
>> 
>> On Linux, however, no matter what I do I only get zeros when recording the -D iec958.
>> 
>> In /proc I see 3 capture sub-devices, where the 2nd is labeled:
>> 
>> # cat /proc/asound/card0/pcm1c/info 
>> ...
>> id: ALC889A Digital
>> name: ALC889A Digital
>> ...
>> 
>> The behavior is the same on booth the MacBook as well as the MacBook Pro with either of those PCI devices:
>> 
>> 00:1b.0 Audio device: Intel Corporation 82801G (ICH7 Family) High Definition Audio Controller (rev 02)
>> 00:1b.0 Audio device: Intel Corporation 82801H (ICH8 Family) HD Audio Controller (rev 03)
>> 
>> I have the feeling there could be some auto sensing be involved, as in the macOS system preferences I see the input switching from Mic to Optical Input as soon as I plugin in an active fibre.
>> 
>> As I’m not familiar with this Intel HD stuff, any hint how to start analyzing and poking this mystery would be highly appreciated.
>> 
>> Best regards,
>> 	René
>> 
>> -- 
>> ExactCODE GmbH, Lietzenburger Str. 42, DE-10789 Berlin
>> http://exactcode.com | http://exactscan.com | http://ocrkit.com | http://t2-project.org | http://rene.rebe.de
>> _______________________________________________
>> Alsa-devel mailing list
>> Alsa-devel at alsa-project.org
>> http://mailman.alsa-project.org/mailman/listinfo/alsa-devel
> 
> -- 
> ExactCODE GmbH, Lietzenburger Str. 42, DE-10789 Berlin
> http://exactcode.com | http://exactscan.com | http://ocrkit.com | http://t2-project.org | http://rene.rebe.de
> 
> _______________________________________________
> Alsa-devel mailing list
> Alsa-devel at alsa-project.org
> http://mailman.alsa-project.org/mailman/listinfo/alsa-devel

-- 
 ExactCODE GmbH, Lietzenburger Str. 42, DE-10789 Berlin
 http://exactcode.com | http://exactscan.com | http://ocrkit.com | http://t2-project.org | http://rene.rebe.de



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