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[Raymond <1355247@xxxxxxxxxxxxxxxxxx>]

https://git.kernel.org/cgit/linux/kernel/git/tiwai/sound.git/commit/sound/pci/hda/patch_sigmatel.c?id=29ac83635fcf244a7178f9fc8f918cd7ddf799d5

seem using dell_bios_spif

Codec: SigmaTel STAC9228
Address: 2
AFG Function Id: 0x1 (unsol 1)
Vendor Id: 0x83847616
Subsystem Id: 0x1028022e
Revision Id: 0x100201


try 

hda-jack-sense-test -a

to find out mic Jack support detection or not

if yes, you need to clear misc bit of mic pin default (bit 8)


0x0e 0x02a79030  

instead of

0x0e 0x02a79130

-- 
You received this bug notification because you are a member of Ubuntu
Touch seeded packages, which is subscribed to alsa-driver in Ubuntu.
https://bugs.launchpad.net/bugs/1355247

Title:
  STAC9228 / Dell XPS M1530 / Mic needs a boost, very low signal

Status in “alsa-driver” package in Ubuntu:
  Incomplete

Bug description:
  Hi,

  I cannot force Ubuntu to work with the integrated sound-card in my
  laptop it's Dell XPS M1530 and sound card is STAC9228.

  Actually it captures sound from mic but its volume is very low, it's
  too quiet and needs boost. I already tried few combinations with:

  gnome-alsamixer
  alsamixer
  pavucontrol
  and of course I tried following ALSA MODELS:

  STAC9227/9228/9229/927x
  =======================
    ref		Reference board
    ref-no-jd	Reference board without HP/Mic jack detection
    3stack	D965 3stack
    5stack	D965 5stack + SPDIF
    5stack-no-fp	D965 5stack without front panel
    dell-3stack	Dell Dimension E520
    dell-bios	Fixes with Dell BIOS setup
    volknob	Fixes with volume-knob widget 0x24
    auto		BIOS setup (default)

  
  Unfortunately it's still very quiet.

  I also read on forums (2008ish) that people already had issues with
  this configuration but they were able to handle it switching input
  device to "digital mic", but I don't have such an option in modern
  Ubuntu..

  Here is my alsa-info result: http://www.alsa-
  project.org/db/?f=7af515217ca211337c5c364231b7480eb5575bcb

  Please advice things I could check. Thank you.

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