Re: Help with Mic on Dell M4700

Jason Harrop <jason@xxxxxxxxxxx> · Tue, 23 May 2017 14:04:51 +1000

I've concluded that the problem is a hardware issue with this particular M4700 laptop, since on another one, the mic works under Ubuntu 16.04 and SUSE.  When I boot this laptop with the other's hard drive (ie the distro in which the mic is working), the mic doesn't work.  Both machines are running the same BIOS version, so I'm putting it down to a hardware issue and moving on.

On Wed, May 10, 2017 at 6:17 AM, Jason Harrop <jason@xxxxxxxxxxx> wrote:
Thanks for your suggestions.  
Yes, I've made sure the mic isn't muted in alsamixer.

I just tried Fedora 25, no joy there either.

The Dell Windows driver for this is IDT High-Definition Audio 92HD93 Driver and is supported on the Latitude 3330/6430u/E5x30/E6x30 and Precision M4700/M6700

ie Latitude E3300, E5430, E5530, E6230, E6330, E6430, E6530

ALSA support for IDT 92HD93 was added years ago by http://www.spinics.net/lists/stable-commits/msg13678.html

sound/pci/hda/patch_sigmatel.c just uses patch_stac92hd83xxx

enum {
	STAC_92HD83XXX_AUTO,
	STAC_92HD83XXX_REF,
	STAC_92HD83XXX_PWR_REF,
	STAC_DELL_S14,
	STAC_92HD83XXX_HP,
	STAC_92HD83XXX_HP_cNB11_INTQUAD,
	STAC_HP_DV7_4000,
	STAC_92HD83XXX_MODELS
};

In HD-Audio-Models.txt we have 

STAC92HD83*
===========
  ref		Reference board
  mic-ref	Reference board with power management for ports
  dell-s14	Dell laptop
  dell-vostro-3500	Dell Vostro 3500 laptop
  hp-dv7-4000	HP dv-7 4000
  hp_cNB11_intquad HP CNB models with 4 speakers
  hp-zephyr	HP Zephyr
  hp-led	HP with broken BIOS for mute LED
  hp-inv-led	HP with broken BIOS for inverted mute LED
  auto		BIOS setup (default)

so I tried model=dell-s14 but that didn't help.

I'm starting to suspect that the support has atrophied in the last couple of years?

thanks .. Jason

On Sun, May 7, 2017 at 6:33 PM, Paul Menzel <paulepanter@users.sourceforge.net> wrote:
Dear Jason,

Am Mittwoch, den 03.05.2017, 15:20 +1000 schrieb Jason Harrop:

> I've got a Dell M4700 running Ubuntu linux 16.04, and the latest ALSA

> driver, but I can't get the internal microphone to work.  I did have a USB

> mic working, but not any more it seems...

[…]

First the obvious, did you make sure, the microphone is not muted?

Have you tried a newer software stack? As you already use Ubuntu, you

could give Ubuntu 17.04 a try. Any other GNU/Linux distribution as

Fedora or Debian also work, and provide live images. You can prepare a

USB storage medium, and boot your system from it, without having to

install it.

If the problem persists, please contact the list alsa-devel, and also

report an issue to the Ubuntu bug tracker [1].

Thanks,

Paul

[1] https://wiki.ubuntu.com/DebuggingSoundProblems

------------------------------------------------------------------------------
Check out the vibrant tech community on one of the world's most
engaging tech sites, Slashdot.org! http://sdm.link/slashdot
_______________________________________________
Alsa-user mailing list
Alsa-user@xxxxxxxxxxxxxxxxxxxxx
https://lists.sourceforge.net/lists/listinfo/alsa-user