[alsa-devel] PROBLEM: Internal microphone (& combined headset jack, in default config) not working on Acer VN7-592G (Skylake)

[Ralf Jung]

Hi,

Thanks for the quick reply!

>> I was able to improve the situation by adding this to modprobe.d:
>>   options snd-hda-intel model=dell-headset-multi
>> Now, mics and external speakers plugged in work fine (where for mics, I
>> need to manually configure them in pacuvontrol: "Speakers" and
>> "Microphone").  Combined headsets also work (with "Headphones" and
>> "Headset Microphone"), i.e. I get audio in and audio out, but the audio
>> in from the microphone is fairly noisy.  I am not sure whether this is
>> due to the headset or the laptop; I am using the same headset with my
>> phone and people I called did not complain about noise.
>>   Furthermore, there is a weird effect: I have a headset with *separate*
>> plugs for speaker and mic (which I used above to test the speaker vs.
>> mic functionality).  If I plug in the speaker part, but configure it as
>> a microhpone (out: "Speakers", in: "Microphone"), then I actually get a
>> (rather noisy) input signal. Not sure what is going on there, but I'm
>> reasonably sure it is getting that signal from the headset, not the
>> internal mic of the laptop.
> 
> It's a configuration with "headphone mic" for Dell, so it doesn't fit
> with yours properly.
> 
> Look at the lspci -nv output, and check the PCI SSID of the
> corresponding device.  Then try to add an entry applying some fixup,
> e.g. ALC269_FIXUP_ASPIRE_HEADSET_MIC, in alc269_fixup_tbl[] defined in
> sound/pci/hda/patch_realtek.c:
> 
> static const struct snd_pci_quirk alc269_fixup_tbl[] = {
> .....
>         SND_PCI_QUIRK(0x1025, XXXX, "Acer Your Model", ALC269_FIXUP_ASPIRE_HEADSET_MIC),
> .....
> 
> There are other definitions for 1025:*, so put your own one there.
> The list is sorted in the id number order.
> 
> There are quite lots of fixup models that can be applied, do figure
> out by trial-and-error.

I tried a bunch of fixup models (and even defined one myself), but none
of them made the internal microhpone work.  Funny enough, the
definitions involving "DELL" work best.

Here's what I tried:

ALC269_FIXUP_ASPIRE_HEADSET_MIC, ALC255_FIXUP_ASPIRE_HEADSET_MIC [*]:
Combined headset plugged into the hack works. PLugging in a "pure" mic
doesn't. pavuctl says "Headset Microphone (unplugged)".

ALC255_FIXUP_HEADSET_MODE, ALC255_FIXUP_HEADSET_MODE_NO_HP_MIC:
No mic works, pavuctl: "Analog Input"

ALC255_FIXUP_DELL1_MIC_NO_PRESENCE, ALC269_FIXUP_DELL1_MIC_NO_PRESENCE:
pavuctl: "Headset Microhpone" & "Microphone". Both kinds of microphone
work (after sometimes manually selecting the right thing in pavuctl),
but the "pure" mix has a 50 Hz noise on it that goes away when I unplug
all cable. Notice that this is running the laptop in a different place
and with a different mic than when I previously tried just passing an
option to the vanilla module, so I don't know whether the 50 Hz hum also
appears in the other conditions.  There's no 50 Hz hum with the
"combined" headset.
  There's a weird bug: When starting Audacity, playback breaks and I
have to switch (in pavuctl) to "Microphone" and then back to "Headset
Microphone" to make it work again.

[*] See attached patch.  Notice that I don't know what I am doing here,
I am just pattern-matching.

I can't realistically try all the hundreds of fixups, so I tried those
that sounded most realistic and those that mention ALC255 (which seems
to be the chip I have).  However, as can be seen above, ALC269-fixups
vs. ALC255-fixups doesn't seem to make any difference.

Kind regards,
Ralf
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