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

Fri Sep 14 17:51:20 CEST 2018

On Fri, 14 Sep 2018 17:45:39 +0200,
Håvard wrote:
> 
> Hi! Sorry for late response, was doing school stuff and had problems trying
> to get nvidia drivers on 4.19-rc3 to work.
> 
> setting options snd-hda-intel model=alc668-headset
> in /etc/modprobe.d/alsa.conf
> on the 4.18.7-gentoo kernel it changed nothing (exept for the layout in
> alsamixer - that is better).
> 
> I checked the source code in sound/pci/hda/patch_realtek.c and there seems
> to be no difference between the code in 4.18.7 and 4.19-rc3

There is a difference, and this option didn't take effect on 4.18.
You need 4.19-rc for allowing that option.

Takashi

> 
> I could try testing more, but I am not good with sound tests without gui.
> 
> -Håvard
> 
> Den ons. 12. sep. 2018 kl. 23:16 skrev Takashi Iwai <tiwai at suse.de>:
> 
> > On Wed, 12 Sep 2018 22:17:14 +0200,
> > Håvard wrote:
> > >
> > > Also,
> > > hda-verb /dev/snd/hwC0D0 0x20 0x500 0xc3 and
> > > hda-verb /dev/snd/hwC0D0 0x20 0x400 0x00
> > > Makes the issue appear again!
> > >
> > > So it seems like 0xc3 toggles it.
> >
> > Good to hear that you nailed it.
> >
> > So this looks like that the alc668 headset mode would work.
> > What happens if you pass model=alc668-headset option with 4.19-rc
> > kernel?  Does it make things working?
> >
> >
> > Takashi
> >
> > >
> > > -Håvard
> > >
> > > Den ons. 12. sep. 2018 kl. 22:14 skrev Håvard <hovardslill at gmail.com>:
> > >
> > > > Can confirm that running:
> > > > hda-verb /dev/snd/hwC0D0 0x20 0x500 0xc3 and
> > > > hda-verb /dev/snd/hwC0D0 0x20 0x440 0x00
> > > > Fixes the issue completely.
> > > >
> > > > Thanks to everyone who helped!
> > > >
> > > > -Håvard
> > > >
> > > > Den ons. 12. sep. 2018 kl. 22:01 skrev Connor McAdams <
> > > > conmanx360 at gmail.com>:
> > > >
> > > >> I might not get around to writing the fix myself, but, here's the
> > > >> COEF's from within Windows. I've marked the ones missing inside the
> > > >> main init function. So, if anyone else wants to add these in, feel
> > > >> free.
> > > >>
> > > >>
> > > >>
> > > >> On Wed, Sep 12, 2018 at 1:16 PM, Håvard <hovardslill at gmail.com>
> > wrote:
> > > >> > That was without running the program (sorry)
> > > >> >
> > > >> > This is output when running program:
> > > >> >
> > > >> > Before there was no "Current verb...."
> > > >> > They came when I opened up windows microphone settings. (something I
> > > >> didn't
> > > >> > do before)
> > > >> >
> > > >> > -Håvard
> > > >> >
> > > >> > Den ons. 12. sep. 2018 kl. 19:11 skrev Håvard <
> > hovardslill at gmail.com>:
> > > >> >>
> > > >> >> I think this is right!
> > > >> >>
> > > >> >> I first booted up, then tested speakers (That I could not hear) and
> > > >> then
> > > >> >> tested microphone (Which worked perfectly) in windows settings.
> > > >> >>
> > > >> >> (My first email was dissaproved as it was too large)
> > > >> >>
> > > >> >> Den ons. 12. sep. 2018 kl. 19:05 skrev Håvard <
> > hovardslill at gmail.com>:
> > > >> >>>
> > > >> >>> I think this is right!
> > > >> >>>
> > > >> >>> I first booted up, then tested speakers (That I could not hear)
> > and
> > > >> then
> > > >> >>> tested microphone (Which worked perfectly) in windows settings.
> > > >> >>>
> > > >> >>> -Håvard
> > > >> >>>
> > > >> >>> Den ons. 12. sep. 2018 kl. 18:49 skrev Connor McAdams
> > > >> >>> <conmanx360 at gmail.com>:
> > > >> >>>>
> > > >> >>>> Also, sorry to keep sending more replies, make sure the only
> > trace
> > > >> you
> > > >> >>>> have on is vfio_region_write, and not the read one. The read
> > spams up
> > > >> >>>> the console.
> > > >> >>>>
> > > >> >>>> On Wed, Sep 12, 2018 at 12:43 PM, Connor McAdams <
> > > >> conmanx360 at gmail.com>
> > > >> >>>> wrote:
> > > >> >>>> > Reason being, it may not have identified the CORB buffer
> > properly
> > > >> or
> > > >> >>>> > something. That's very odd to have no data. Never seen that
> > before.
> > > >> >>>> >
> > > >> >>>> > On Wed, Sep 12, 2018 at 12:42 PM, Connor McAdams
> > > >> >>>> > <conmanx360 at gmail.com> wrote:
> > > >> >>>> >> Could you try again and make a copy of your terminal output?
> > > >> >>>> >>
> > > >> >>>> >> On Wed, Sep 12, 2018 at 12:41 PM, Håvard <
> > hovardslill at gmail.com>
> > > >> >>>> >> wrote:
> > > >> >>>> >>> Hi again.
> > > >> >>>> >>> Sorry for not noticing all files were empty, did it not run
> > for
> > > >> long
> > > >> >>>> >>> enough?
> > > >> >>>> >>>
> > > >> >>>> >>> -Håvard
> > > >> >>>> >>>
> > > >> >>>> >>> Den ons. 12. sep. 2018 kl. 18:39 skrev Håvard
> > > >> >>>> >>> <hovardslill at gmail.com>:
> > > >> >>>> >>>>
> > > >> >>>> >>>> Sorry my bad again it was working perfectly, just missed a
> > step.
> > > >> >>>> >>>>
> > > >> >>>> >>>> I'll add the dumps as an attatchment. I had both external
> > > >> headset
> > > >> >>>> >>>> and
> > > >> >>>> >>>> microphone plugged in and let the VM run in the background
> > for
> > > >> >>>> >>>> ~30min while
> > > >> >>>> >>>> doing other stuff. I did not play music or test my
> > microphone in
> > > >> >>>> >>>> the VM
> > > >> >>>> >>>> either, If i did anything wrong, please tell me!
> > > >> >>>> >>>>
> > > >> >>>> >>>> It stopped at 0x104f4
> > > >> >>>> >>>>
> > > >> >>>> >>>> -Håvard
> > > >> >>>> >>>>
> > > >> >>>> >>>> Den ons. 12. sep. 2018 kl. 00:31 skrev Connor McAdams
> > > >> >>>> >>>> <conmanx360 at gmail.com>:
> > > >> >>>> >>>>>
> > > >> >>>> >>>>> Hm.... that's odd. They should show up in the folder you
> > ran
> > > >> the
> > > >> >>>> >>>>> command from. Does your console show any "DumpMem
> > entered..."
> > > >> or
> > > >> >>>> >>>>> something like that? You may have a permissions error.
> > I've had
> > > >> >>>> >>>>> some
> > > >> >>>> >>>>> people report that as an issue before.
> > > >> >>>> >>>>>
> > > >> >>>> >>>>> On Tue, Sep 11, 2018 at 5:08 PM, Håvard <
> > hovardslill at gmail.com
> > > >> >
> > > >> >>>> >>>>> wrote:
> > > >> >>>> >>>>> > Hi!
> > > >> >>>> >>>>> >
> > > >> >>>> >>>>> > Took a while, but I think I got it working. Did not see
> > any
> > > >> >>>> >>>>> > "frame[xx]"
> > > >> >>>> >>>>> > files though. What dumps do you want?
> > > >> >>>> >>>>> >
> > > >> >>>> >>>>> > -Håvard
> > > >> >>>> >>>>> >
> > > >> >>>> >>>>> > Den tir. 11. sep. 2018 kl. 21:27 skrev Håvard
> > > >> >>>> >>>>> > <hovardslill at gmail.com>:
> > > >> >>>> >>>>> >>
> > > >> >>>> >>>>> >> Sorry about that, I forgot to enable a kernel config...
> > > >> >>>> >>>>> >>
> > > >> >>>> >>>>> >> -Håvard
> > > >> >>>> >>>>> >>
> > > >> >>>> >>>>> >> Den tir. 11. sep. 2018 kl. 21:20 skrev Connor McAdams
> > > >> >>>> >>>>> >> <conmanx360 at gmail.com>:
> > > >> >>>> >>>>> >>>
> > > >> >>>> >>>>> >>> 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)>]
> > > >> >>>> >>>>> >>> >> >>> >
> > > >> >>>> >>>>> >>> >> >>>
> > > >> >>>> >>>>> >>> >> >>
> > > >> >>>> >>>>> >>> >> > _______________________________________________
> > > >> >>>> >>>>> >>> >> > Alsa-devel mailing list
> > > >> >>>> >>>>> >>> >> > Alsa-devel at alsa-project.org
> > > >> >>>> >>>>> >>> >> >
> > > >> >>>> >>>>> >>> >> >
> > > >> http://mailman.alsa-project.org/mailman/listinfo/alsa-devel
> > > >>
> > > >
> > > [2  <text/html; UTF-8 (quoted-printable)>]
> > >
> >
> [2  <text/html; UTF-8 (quoted-printable)>]
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