[Bug 530124] [NEW] [USB-Audio - Z-10 USB Speaker] Volume scaling wrong in lucid, regression

[Ernst Sjöstrand]

Public bug reported:

Binary package hint: linux-image

Kernel 2.6.32 no longer gives the correct volume range information about these speakers.
It works fine in karmic. This is really an upstream bug report, I have filed it here:
https://bugtrack.alsa-project.org/alsa-bug/view.php?id=4803
With kernel 2.6.31 and libasound 1.0.20 I got perfect volume ranges for my Logitech Z-10 USB Speakers, -41,00 dB to 1,24 dB feels just about right.

When I upgraded to 2.6.32-rc6 I didn't get any range information at all
until I upgraded to libasound 1.0.21. Now I'm getting completely bogus
volume range information, 0 dB to 3 dB

ProblemType: Bug
AlsaVersion: Advanced Linux Sound Architecture Driver Version 1.0.21.
Architecture: amd64
AudioDevicesInUse:
 USER        PID ACCESS COMMAND
 /dev/snd/controlC2:  ernst      1692 F.... pulseaudio
 /dev/snd/controlC0:  ernst      1692 F.... pulseaudio
Card0.Amixer.info:
 Card hw:0 'NVidia'/'HDA NVidia at 0xfe024000 irq 22'
   Mixer name	: 'Realtek ALC888'
   Components	: 'HDA:10ec0888,147ba601,00100001'
   Controls      : 35
   Simple ctrls  : 20
Card1.Amixer.info:
 Card hw:1 'HDMI'/'HDA ATI HDMI at 0xfddfc000 irq 16'
   Mixer name	: 'ATI R6xx HDMI'
   Components	: 'HDA:1002aa01,00aa0100,00100100'
   Controls      : 4
   Simple ctrls  : 1
Card1.Amixer.values:
 Simple mixer control 'IEC958',0
   Capabilities: pswitch pswitch-joined penum
   Playback channels: Mono
   Mono: Playback [off]
Card2.Amixer.info:
 Card hw:2 'Speaker'/'Logitech Z-10 USB Speaker at usb-0000:00:04.0-1, full speed'
   Mixer name	: 'USB Mixer'
   Components	: 'USB046d:0a07'
   Controls      : 4
   Simple ctrls  : 3
Date: Mon Mar  1 17:05:11 2010
DistroRelease: Ubuntu 10.04
InstallationMedia: Ubuntu 10.04 "Lucid Lynx" - Alpha amd64 (20100113)
LiveMediaBuild: Ubuntu 10.04 "Lucid Lynx" - Alpha amd64 (20100215.1)
Package: pulseaudio 1:0.9.22~0.9.21+stable-queue-32-g8478-0ubuntu11
ProcEnviron:
 LANG=sv_SE.utf8
 SHELL=/bin/bash
ProcVersionSignature: Ubuntu 2.6.32-14.20-preempt
SelectedCard: 2 Speaker USB-Audio - Z-10 USB Speaker
SourcePackage: pulseaudio
Symptom: audio
Title: [USB-Audio - Z-10 USB Speaker] PA test tone failed (alsa tone succeeded)
Uname: Linux 2.6.32-14-preempt x86_64

** Affects: linux-ports-meta (Ubuntu)
     Importance: Undecided
         Status: New


** Tags: amd64 apport-bug lucid

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[USB-Audio - Z-10 USB Speaker] Volume scaling wrong in lucid, regression
https://bugs.launchpad.net/bugs/530124
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