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

[Connor McAdams]

When it's bound as a stub, it shouldn't show up in alsamixer controls.
You can check what module is loaded by doing lspci -v . It should say
kernel driver in use: pci-stub. Also, did you run the vfio-bind script
before trying it?

On Tue, Sep 11, 2018 at 3:18 PM, Håvard <hovardslill at gmail.com> wrote:
> Thank you for the offer!
>
> I run gentoo, but your github guide is very useful. I can't seem to bind my
> audio driver to a pci-stud. Is the Sound card still supposed to function as
> normal when I (think I) have bound it to a stud.
>
> -Håvard
>
> Den tir. 11. sep. 2018 kl. 20:26 skrev Connor McAdams
> <conmanx360 at gmail.com>:
>>
>> 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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