[alsa-devel] Intel HDA & Realtek issues on ASUS G751JM

[Nicolae Rosia]

On Sat, Jun 13, 2015 at 6:14 AM, Raymond Yau
<superquad.vortex2 at gmail.com> wrote:
> If your specifcaion and user guide does not mention the support of surround
> 5.1
>
> You need to find out the internal subwoofer use both channel or just left or
> right
>
> speaker-test -c4 -t wav -D hw:0,0
>
> If you hear high frequency from subwoofer, this mean you need software low
> pass filtter
>
After removing all jacks and testing with speaker-test -c 4 -t wav -D hw:1,0

speaker-test 1.0.29

Playback device is hw:1,0
Stream parameters are 48000Hz, S16_LE, 4 channels
WAV file(s)
Rate set to 48000Hz (requested 48000Hz)
Buffer size range from 32 to 524288
Period size range from 16 to 262144
Using max buffer size 524288
Periods = 4
was set period_size = 131072
was set buffer_size = 524288
 0 - Front Left
 1 - Front Right
 3 - Rear Right
 2 - Rear Left
^CTime per period = 9.384977

I can hear high frequency from internal subwoofer while speaker-test
printed 3 and 2.

> Two headphone jacks, internal speaker and subwoofer
>
> There are only three playback volume controls
>
> http://mailman.alsa-project.org/pipermail/alsa-devel/2015-June/093668.html
>
> Your case are
>
> A. 3 DACs, 2 HP, 2 speakers
>
> Node 0x1a [Pin Complex] wcaps 0x40058f: Stereo Amp-In Amp-Out
>   Control: name="Bass Speaker Playback Switch", index=0, device=0
>     ControlAmp: chs=3, dir=Out, idx=0, ofs=0
>   Control: name="Speaker Surround Phantom Jack", index=0, device=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 0x90170130: [Fixed] Speaker at Int N/A
>     Conn = Analog, Color = Unknown
>     DefAssociation = 0x3, Sequence = 0x0
>     Misc = NO_PRESENCE
>   Pin-ctls: 0x00: VREF_HIZ
>   Unsolicited: tag=00, enabled=0
>   Power states:  D0 D1 D2 D3 EPSS
>   Power: setting=D0, actual=D0
>   Connection: 3
>      0x0c 0x0d* 0x0e