[alsa-devel] Microphone detected, but no output for all ASUS G751xx with ALC668 chipset

[Connor McAdams]

One thing you could try, is using the program I used to reverse
engineer the Sound Blaster Z series of cards, QemuHDADump. If your
processor supports pci-passthrough with a virtual machine, you could
run a Windows virtual machine with the sound card in it and capture
the commands. I'd be willing to look through the dumps to see if there
are any special verbs or anything.

You can find the program here: https://github.com/Conmanx360/QemuHDADump

Let me know.

On Tue, Sep 11, 2018 at 2:15 PM, Håvard <hovardslill at gmail.com> wrote:
> Sorry, my gmail didn't update so I wrote my response before I read your
> last one.
>
> It is a separate mic port as the G751JT doesn't have any headset multijacks.
>
> I'll try and dig around in the kernel! Thanks for the tip!
>
> -Håvard
>
> Den tir. 11. sep. 2018 kl. 20:09 skrev Håvard <hovardslill at gmail.com>:
>
>> Thank you for taking your time and trying to help! :)
>>
>> Do you know where I can ask around for more help on the issue? I don't
>> want to give up yet.
>>
>> -Håvard
>>
>> Den tir. 11. sep. 2018 kl. 20:02 skrev Takashi Iwai <tiwai at suse.de>:
>>
>>> On Tue, 11 Sep 2018 19:14:37 +0200,
>>> Håvard wrote:
>>> >
>>> > Yes, microphone gets detected instantly and it automatically changes to
>>> it
>>> > in pavucontrol.
>>>
>>> Then it likely requires some additional initialization outside
>>> HD-audio.  It's hard to know, as it's pretty much vendor-specific.
>>> You can dig down the Windows, but I have no idea about Windows
>>> implementation, so can't give any hints, unfortunately.
>>>
>>>
>>> Takashi
>>>
>>> >
>>> > Den tir. 11. sep. 2018 kl. 18:52 skrev Takashi Iwai <tiwai at suse.de>:
>>> >
>>> > > On Tue, 11 Sep 2018 18:40:23 +0200,
>>> > > Håvard wrote:
>>> > > >
>>> > > > Thank you for replying!
>>> > > >
>>> > > > Enabling loopback in alsamixer:
>>> > > > http://i.imgur.com/lNo6e7T.png
>>> > > >
>>> > > > And unmuting more and more things in "Mic Playback Volume" in
>>> > > hdaanalyzer:
>>> > > > http://i.imgur.com/H0HiOhy.png
>>> > > > made white noise come from the headset. However it did not change or
>>> > > react
>>> > > > at all when I talked or even muted the microphone physically.
>>> > > >
>>> > > > I couldn't find "Mic Playback Switch" anywhere in either alsamixer
>>> or
>>> > > > hdaanalyzer.
>>> > >
>>> > > It's a mixer mute switch.
>>> > >
>>> > > > The microphone works perfectly fine under Windows, so I don't think
>>> it is
>>> > > > the mic pin.
>>> > >
>>> > > But the fact above indicates the possibility of the wrong pin, too.
>>> > >
>>> > > Does the jack detection of the ext mic pin work?
>>> > >
>>> > >
>>> > > Takashi
>>> > >
>>> > > >
>>> > > > -Håvard
>>> > > >
>>> > > > Den man. 10. sep. 2018 kl. 22:39 skrev Takashi Iwai <tiwai at suse.de
>>> >:
>>> > > >
>>> > > > > On Thu, 06 Sep 2018 20:44:30 +0200,
>>> > > > > Håvard wrote:
>>> > > > > >
>>> > > > > > Additional relevant info:
>>> > > > > >
>>> > > > > > A similar issue was also discussed three years ago on Sun Jun
>>> > > 17:15:54
>>> > > > > CEST
>>> > > > > > 2015 and was about his surround sound setup, but did not touch
>>> on the
>>> > > > > > external microphone problem:
>>> > > > > >
>>> > > > >
>>> > >
>>> http://mailman.alsa-project.org/pipermail/alsa-devel/2015-June/093317.html
>>> > > > > >
>>> > > > > > alsa-info.sh:
>>> > > > > >
>>> > > > >
>>> > >
>>> http://www.alsa-project.org/db/?f=1d8616ba5977308e03db6c3a86e36e9e9b38d6f0
>>> > > > > >
>>> > > > > > Graph of ALC668 chipset from hdaanalyzer:
>>> > > > > > http://i.imgur.com/c08DNJW.png
>>> > > > > >
>>> > > > > > setting alsa-mode[1-8] does nothing to help the issue.
>>> > > > > >
>>> > > > > > There are several of similar bug reports around the web
>>> experiencing
>>> > > > > > similar issues, and on different distros.
>>> > > > > >
>>> > > > > > Microphone works perfectly in windows
>>> > > > > >
>>> > > > > > I have a ASUS ROG G751JT, but this problem seems to happen with
>>> all
>>> > > > > laptops
>>> > > > > > under the G751 name.
>>> > > > >
>>> > > > > When you enable the loopback volume and switch, and unmute/adjust
>>> "Mic
>>> > > > > Playback Volume", and "Mic Playback Switch", do you hear the input
>>> > > > > from the ext mic?  It's a route directly from NID 0x18 to the
>>> mixer
>>> > > > > NID 0x0b, then output mixer NID 0x0c, then outputs.  So this can
>>> be
>>> > > > > used to verify the hardware routing.
>>> > > > >
>>> > > > > If you don't hear via this route, it means that the input from
>>> the ext
>>> > > > > mic pin itself is broken, and it implies that something outside
>>> > > > > HD-audio codec.
>>> > > > >
>>> > > > >
>>> > > > > Takashi
>>> > > > >
>>> > > > [2  <text/html; UTF-8 (quoted-printable)>]
>>> > > >
>>> > >
>>> > [2  <text/html; UTF-8 (quoted-printable)>]
>>> >
>>>
>>
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