[Bug 476224] [NEW] sound crackles when changing volume

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Ubuntu 9.10
sound card: Asus Xonar DX
alsa 1.0.20-2ubuntu6

Whenever I adjust the sound through the gnome volume bar, the sound
starts to crackle, and sometimes stop completely.

The sound cracks a bit when adjusting it in alsamixe. Usually just a
hardly noticeable pop or two.  Whenever I use the gnome volume bar, the
sound tends to get really bad.  Usually it starts by getting very
distorted for about a second, then there will be a few seconds with
practically no sound (usually a few pops), then sound comes back on with
lots of distortion and the distortion fades away within about a second.
It last around 5 seconds to over a minutes whenever I changed my volume.

The length of time the volume stops, or is distorted depends on how much
I move the bar.  if I drag it from 100% to 25%, I can expect over a
minute wait before I can hear sound again.

This does not happen when I adjust the volume through Rythmbox, Movie
Player or VLC player.

If I leave the volume in the gnome bar alone, the sound remains clear.

ProblemType: Bug
Architecture: amd64
ArecordDevices:
 **** List of CAPTURE Hardware Devices ****
 card 0: DX [Xonar DX], device 0: Multichannel [Multichannel]
   Subdevices: 1/1
   Subdevice #0: subdevice #0
AudioDevicesInUse:
 USER        PID ACCESS COMMAND
 /dev/snd/controlC0:  cheez      2138 F.... pulseaudio
 /dev/snd/pcmC0D0p:   cheez      2138 F...m pulseaudio
Card0.Amixer.info:
 Card hw:0 'DX'/'Asus Virtuoso 100 (rev 2) at 0xe800, irq 16'
   Mixer name	: 'AV200'
   Components	: 'CS4398 CS4362A CS5361 AV200'
   Controls      : 16
   Simple ctrls  : 9
Date: Fri Nov  6 02:35:37 2009
DistroRelease: Ubuntu 9.10
InstallationMedia: Ubuntu 9.10 "Karmic Koala" - Release amd64 (20091027)
NonfreeKernelModules: fglrx
Package: alsa-base 1.0.20+dfsg-1ubuntu5
PackageArchitecture: all
ProcEnviron:
 LANG=en_CA.UTF-8
 SHELL=/bin/bash
ProcVersionSignature: Ubuntu 2.6.31-14.48-generic
SourcePackage: alsa-driver
Uname: Linux 2.6.31-14-generic x86_64

** Affects: linux (Ubuntu)
     Importance: Undecided
         Status: Confirmed

-- 
sound crackles when changing volume
https://bugs.edge.launchpad.net/bugs/476224
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