[alsa-devel] Issues and/or possible bugs in alsa

[Yomi Ogunwumi]

I don't think I've disabled anything.

• Yomi
On Apr 12, 2015 12:31 PM, "Raymond Yau" <superquad.vortex2 at gmail.com> wrote:

> >
> > I'm not sure if it worked with pervious kernel versions. There was a
> time I rolled back earlier kernel versions — The result was the same, it
> didn't work.
> >
> > It might have worked with Windows 8, but I had installed Arch soon after
> obtaining the laptop.
>
> >Second. When I plug in these headphones, I can't use the internal
> microphone on this laptop, it mutes. (AFAICT) These headphones do not have
> a microphone built in, they're just an ordinary pair of headphones.
> However, I was given a workaround in #alsa on freenode. In order to use the
> laptop's internal microphone with my headphones plugged in, I have to do :
> sudo hda-verb /dev/snd/hwC1D0 0x22 SET_CONNECT_SEL 6 — it works, but it
> isn't really ideal.
>
> 0x22 [Audio Selector] wcaps 0x30010b: Stereo Amp-In
>   Amp-In caps: N/A
>   Amp-In vals:  [0x00 0x00] [0x00 0x00] [0x00 0x00] [0x00 0x00] [0x00
> 0x00] [0x00 0x00] [0x00 0x00]
>   Connection: 7
>      0x18 0x19 0x1a 0x1b 0x1d 0x0b 0x12*
>
> Do you mean disable jack detection cannot work around this jack detection
> fault ?
>
> Using hda-emu,  the driver seem select internal mic when jack detection is
> disabled on startup
>
> >>
> >> How about disable jack detect using hint jack_detect=0 ?
> >>
> >>
> https://git.kernel.org/cgit/linux/kernel/git/tiwai/sound.git/tree/Documentation/sound/alsa/HD-Audio.txt
> >>
> >> you have to select mic jack using capture source and manually mute the
> speaket
>