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[Attila Hammer <hammera@xxxxxxxxx>]

Because my desktop machine have similar issue with an Nvidia integrated 
soundcard related, I looked again what volume meters are muted default 
when I booted with Ubuntu 10.04.3 live CD my desktop machine.
The results is very similar with I experienced the Intel N10 soundcard 
related.
I only doed following:
1. After the desktop presented my screen, I opened GNOME Terminal, and 
ran amixer >sound1.txt command to store original mixer values with a 
text file.
2. I launch Sound preference tool, and uncheck only the mute check box, 
not increased volume meters.
3. I ran again with amixer >sound2.txt command to generate new changed 
volume meters with an another text file.
4. I ran diff -u sound1.txt sound2.txt command to generate a diff style 
output what volume meters status are changed from off to on after I 
unchecked the mute checkbox in Sound preference tool.

I attaching the sound1.txt, sound2.txt, and 
sound-volumes-differences.txt files.
To easyest your work, I copyed diff output:
--- sound1.txt	2011-10-02 09:27:14.057861934 +0200
+++ sound2.txt	2011-10-02 09:28:24.398364608 +0200
@@ -42,25 +42,25 @@
    Playback channels: Front Left - Front Right
    Limits: Playback 0 - 31
    Mono:
-  Front Left: Playback 0 [0%] [-46.50dB] [off]
-  Front Right: Playback 0 [0%] [-46.50dB] [off]
+  Front Left: Playback 0 [0%] [-46.50dB] [on]
+  Front Right: Playback 0 [0%] [-46.50dB] [on]
  Simple mixer control 'Center',0
    Capabilities: pvolume pvolume-joined pswitch pswitch-joined penum
    Playback channels: Mono
    Limits: Playback 0 - 31
-  Mono: Playback 0 [0%] [-46.50dB] [off]
+  Mono: Playback 0 [0%] [-46.50dB] [on]
  Simple mixer control 'LFE',0
    Capabilities: pvolume pvolume-joined pswitch pswitch-joined penum
    Playback channels: Mono
    Limits: Playback 0 - 31
-  Mono: Playback 0 [0%] [-46.50dB] [off]
+  Mono: Playback 0 [0%] [-46.50dB] [on]
  Simple mixer control 'Side',0
    Capabilities: pvolume pswitch penum
    Playback channels: Front Left - Front Right
    Limits: Playback 0 - 31
    Mono:
-  Front Left: Playback 0 [0%] [-46.50dB] [off]
-  Front Right: Playback 0 [0%] [-46.50dB] [off]
+  Front Left: Playback 0 [0%] [-46.50dB] [on]
+  Front Right: Playback 0 [0%] [-46.50dB] [on]
  Simple mixer control 'Line',0
    Capabilities: pvolume pswitch penum
    Playback channels: Front Left - Front Right

After I done this three file generation, I reboot with live CD, and look 
in terminal what volume meter status change resulting sound turning on 
this sound card resulting I hear sound again.
When I ran amixer set 'LFE',0 on command, I hear sound again, because my 
machine only have connected two speakers.

So you see, my desktop machine the Nvidia sound card related little 
different volume meters are muted by default, but amixer set 'LFE',0 on 
command result sound turning on too if two speakers are connected this 
other sound card.
I try making a patch with merging this two bugreport fix with one patch. 
When I done this fix, generating a custom live CD and testing two 
machines the patch.
I attaching future this bugreport the patch, or the other bugreport Bug 
564472)? What type fix you are accept future?
I attached the my desktop machines generated soundcard related text 
files with following bugreport:
https://bugs.launchpad.net/bugs/564472

Attila

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You received this bug notification because you are a member of Desktop
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https://bugs.launchpad.net/bugs/862287

Title:
  [Lucid] Front, Surround, LFE, and Center volume meters are default
  muted with 00:1b.0 Audio device: Intel Corporation N10/ICH 7 Family
  High Definition Audio Controller (rev 01) sound card

Status in “gnome-media” package in Ubuntu:
  New

Bug description:
  Dear Developers,

  In Ubuntu 10.04.3 release if an user booted with the live CD, default the live system with following volum,e meters are default muted, I copyed amixer names:
  'Front',0
  'Surround',0
  'Center',0
  'LFE',0
  If I launch with GNOME Volume Control preference tool, mincreasing the output slider and uncheck the mute checkbox, the problem is resolved.
  Of course, this problem fixing is important for a11y related, because a screen reader user is important to default hear the screen reader audio output.
  I don't no yet this problem are present with newest Ubuntu releases this soundcard chipset, and I not often possible to use this machine with testing this problem.

  I attaching two amixer text file, first file is showing the original
  result, second shoving the results after I unchecked the mute checkbox
  with GNOME Volume Control preference tool.

  To easyest your work, I doed a diff output with two text file with diff -u command, see the results:
  --- hang1.txt	2011-09-29 13:26:00.941940936 +0200
  +++ hang2.txt	2011-09-29 13:27:00.877940898 +0200
  @@ -8,32 +8,32 @@
     Playback channels: Front Left - Front Right
     Limits: Playback 0 - 255
     Mono:
  -  Front Left: Playback 255 [100%] [0.00dB]
  -  Front Right: Playback 255 [100%] [0.00dB]
  +  Front Left: Playback 254 [100%] [0.20dB]
  +  Front Right: Playback 254 [100%] [0.20dB]
   Simple mixer control 'Front',0
     Capabilities: pvolume pswitch penum
     Playback channels: Front Left - Front Right
     Limits: Playback 0 - 64
     Mono:
  -  Front Left: Playback 52 [81%] [-9.00dB] [on]
  -  Front Right: Playback 52 [81%] [-9.00dB] [on]
  +  Front Left: Playback 64 [100%] [0.00dB] [on]
  +  Front Right: Playback 64 [100%] [0.00dB] [on]
   Simple mixer control 'Surround',0
     Capabilities: pvolume pswitch penum
     Playback channels: Front Left - Front Right
     Limits: Playback 0 - 64
     Mono:
  -  Front Left: Playback 64 [100%] [0.00dB] [off]
  -  Front Right: Playback 64 [100%] [0.00dB] [off]
  +  Front Left: Playback 64 [100%] [0.00dB] [on]
  +  Front Right: Playback 64 [100%] [0.00dB] [on]
   Simple mixer control 'Center',0
     Capabilities: pvolume pvolume-joined pswitch pswitch-joined penum
     Playback channels: Mono
     Limits: Playback 0 - 64
  -  Mono: Playback 64 [100%] [0.00dB] [off]
  +  Mono: Playback 64 [100%] [0.00dB] [on]
   Simple mixer control 'LFE',0
     Capabilities: pvolume pvolume-joined pswitch pswitch-joined penum
     Playback channels: Mono
     Limits: Playback 0 - 64
  -  Mono: Playback 64 [100%] [0.00dB] [off]
  +  Mono: Playback 64 [100%] [0.00dB] [on]
   Simple mixer control 'Line Jack Mode',0
     Capabilities: enum
     Items: 'Mic In' 'Line In' 'Line Out'

  
  Attila

  ProblemType: Bug
  DistroRelease: Ubuntu 10.04
  Package: gnome-media 2.30.0-0ubuntu1
  ProcVersionSignature: Ubuntu 2.6.32-33.70-generic 2.6.32.41+drm33.18
  Uname: Linux 2.6.32-33-generic i686
  Architecture: i386
  Date: Thu Sep 29 13:37:52 2011
  LiveMediaBuild: Ubuntu 10.04.3 LTS "Lucid Lynx" - Release i386 (20110720.1)
  ProcEnviron:
   LANGUAGE=hu_HU:en
   LANG=hu_HU.UTF-8
   LC_MESSAGES=hu_HU.UTF-8
   SHELL=/bin/bash
  SourcePackage: gnome-media

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