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[Raymond <893210@xxxxxxxxxxxxxxxxxx>]

0:72 = 1804
0:74 = 1001
0:76 = 2010


cat /proc/asound/card0/intel8x0
 Intel8x0

Global control : 0xc0000002
 Global status : 0x00700100
 SDM : 0x00000008
 AC'97 codecs ready : primary
 AC'97 codecs SDIN : 0 0 0


card*/codec97#0/ac97#?-?+regs
  Shows the AC97 register dump. Useful for debugging.

 recompile alsa driver with CONFIG_SND_DEBUG is enabled, you can write to this file for
  changing an AC97 register directly. 

Pass two hex numbers.
  For example,

 # echo 02 9f1f > /proc/asound/card0/codec97#0/ac97#0-0+regs

this change master playback volume register


with headphone unplugged

set js1 mode bit of ac97 register 0x72

echo 72 1824 > /proc/asound/card0/codec97#0/ac97#0-0+regs

plug headphone

cat /proc/asound/card0/intel8x0

check bit 0 of global status is set or not

repeat the test with line out by set js0 mode

if gpi bit of global status was set after jack is plugged

we need to add a check of this bit  in snd_intel8x0_interrupt and call
those ad198x_handle_jp_jack

-- 
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https://bugs.launchpad.net/bugs/893210

Title:
  [Dell OptiPlex GX620 - AD1981b, playback] No sound at all

Status in ALSA driver:
  Confirmed
Status in alsa-driver package in Ubuntu:
  Incomplete

Bug description:
  fresh install of ubuntu studio and updates but internal speakers do
  not play. dell optiplex gx620 love ya

  ProblemType: Bug
  DistroRelease: Ubuntu 11.10
  Package: alsa-base 1.0.24+dfsg-0ubuntu2
  ProcVersionSignature: Ubuntu 3.0.0-13.22-generic 3.0.6
  Uname: Linux 3.0.0-13-generic i686
  AlsaVersion: Advanced Linux Sound Architecture Driver Version 1.0.24.
  ApportVersion: 1.23-0ubuntu4
  Architecture: i386
  Card0.Amixer.info:
   Card hw:0 'ICH7'/'Intel ICH7 with AD1981B at irq 23'
     Mixer name	: 'Analog Devices AD1981B'
     Components	: 'AC97a:41445374'
     Controls      : 28
     Simple ctrls  : 20
  Card1.Amixer.info:
   Card hw:1 'Device'/'C-Media Electronics Inc. USB Multimedia Audio Device at usb-0000:00:1d.7-4.1.4,'
     Mixer name	: 'USB Mixer'
     Components	: 'USB0d8c:0105'
     Controls      : 13
     Simple ctrls  : 6
  Date: Mon Nov 21 11:51:25 2011
  InstallationMedia: Ubuntu-Studio 11.10 "Oneiric Ocelot" - Release i386 (20111011.1)
  PackageArchitecture: all
  ProcEnviron:
   PATH=(custom, no user)
   LANG=en_US.UTF-8
   SHELL=/bin/bash
  SourcePackage: alsa-driver
  Symptom: audio
  Symptom_AlsaPlaybackTest: ALSA playback test through plughw:ICH7 failed
  Symptom_Card: CM108 Audio Controller - USB Multimedia Audio Device
  Symptom_Type: No sound at all
  Title: [ICH4 - Intel ICH7, playback] No sound at all
  UpgradeStatus: Upgraded to oneiric on 2011-11-12 (8 days ago)
  dmi.bios.date: 11/30/2006
  dmi.bios.vendor: Dell Inc.
  dmi.bios.version: A11
  dmi.board.name: 0F8101
  dmi.board.vendor: Dell Inc.
  dmi.chassis.type: 15
  dmi.chassis.vendor: Dell Inc.
  dmi.modalias: dmi:bvnDellInc.:bvrA11:bd11/30/2006:svnDellInc.:pnOptiPlexGX620:pvr:rvnDellInc.:rn0F8101:rvr:cvnDellInc.:ct15:cvr:
  dmi.product.name: OptiPlex GX620
  dmi.sys.vendor: Dell Inc.

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