[USB-Audio - UA-4FX, playback] Underruns, dropouts or crackling sound

[Michael Hendry]

Description: Ubuntu 12.04 LTS
Release: 12.04

Problem is in alsa-driver 1.0.24

I expected the sound to be as good as it was in Ubuntu 10.04, which is also installed on this computer, but get crackles overlaid on the sound at random intervals, especially bad if there is a lot of screen activity (e.g. watching an MP4 file in Totem, or using Skype with video).

ProblemType: Bug
DistroRelease: Ubuntu 12.04
Package: alsa-base 1.0.25+dfsg-0ubuntu1
ProcVersionSignature: Ubuntu 3.2.0-26.41-generic-pae 3.2.19
Uname: Linux 3.2.0-26-generic-pae i686
AlsaVersion: Advanced Linux Sound Architecture Driver Version 1.0.24.
ApportVersion: 2.0.1-0ubuntu8
Architecture: i386
AudioDevicesInUse:
 USER PID ACCESS COMMAND
 /dev/snd/controlC2: michael 2124 F.... pulseaudio
 /dev/snd/controlC0: michael 2124 F.... pulseaudio
 /dev/snd/pcmC0D0p: michael 2124 F...m pulseaudio
 /dev/snd/controlC1: michael 2124 F.... pulseaudio
Card0.Amixer.info:
 Card hw:0 'UA4FX'/'EDIROL UA-4FX at usb-0000:00:1d.2-2.4, full speed'
   Mixer name : ''
   Components : 'USB0582:00a3'
   Controls : 1
   Simple ctrls : 1
Card0.Amixer.values:
 Simple mixer control 'MIDI Input Mode',0
   Capabilities: enum
   Items: 'High Load' 'Light Load'
   Item0: 'Light Load'
Card1.Amixer.info:
 Card hw:1 'Camera'/'Sonix Technology Co., Ltd. USB 2.0 Camera at usb-0000:00:1d.7-1, high speed'
   Mixer name : 'USB Mixer'
   Components : 'USB0c45:62e0'
   Controls : 2
   Simple ctrls : 1
Card1.Amixer.values:
 Simple mixer control 'Mic',0
   Capabilities: cvolume cvolume-joined cswitch cswitch-joined penum
   Capture channels: Mono
   Limits: Capture 0 - 3328
   Mono: Capture 1815 [55%] [25.08dB] [on]
Card2.Amixer.info:
 Card hw:2 'Intel'/'HDA Intel at 0xefffc000 irq 43'
   Mixer name : 'SigmaTel STAC9221 A1'
   Components : 'HDA:83847680,102801ab,00103201'
   Controls : 27
   Simple ctrls : 14
CheckboxSubmission: fcc91fd10566b730f3440dab960d229e
CheckboxSystem: 2a6f54df59af338184485e85cbcf0d32
Date: Tue Jul 3 14:27:51 2012
InstallationMedia: Ubuntu 12.04 LTS "Precise Pangolin" - Release i386 (20120423)
PackageArchitecture: all
ProcEnviron:
 LANGUAGE=en_GB:en
 PATH=(custom, user)
 LANG=en_GB.UTF-8
 SHELL=/bin/bash
SourcePackage: alsa-driver
Symptom: audio
Symptom_AlsaPlaybackTest: ALSA playback test through plughw:UA4FX successful
Symptom_Card: Built-in Audio - HDA Intel
Symptom_PulsePlaybackTest: PulseAudio playback test successful
Symptom_Type: Underruns, dropouts, or "crackling" sound
Title: [USB-Audio - UA-4FX, playback] Underruns, dropouts or crackling sound
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 08/15/2005
dmi.bios.vendor: Dell Inc.
dmi.bios.version: A00
dmi.board.name: 0RD203
dmi.board.vendor: Dell Inc.
dmi.chassis.type: 6
dmi.chassis.vendor: Dell Inc.
dmi.modalias: dmi:bvnDellInc.:bvrA00:bd08/15/2005:svnDellInc.:pnDellDM051:pvr:rvnDellInc.:rn0RD203:rvr:cvnDellInc.:ct6:cvr:
dmi.product.name: Dell DM051
dmi.sys.vendor: Dell Inc.

[Launchpad Janitor (janitor)]

Status changed to 'Confirmed' because the bug affects multiple users.

[Marcus Tomlinson (marcustomlinson)]

This release of Ubuntu is no longer receiving maintenance updates. If this is still an issue on a maintained version of Ubuntu please let us know.

[Launchpad Janitor (janitor)]

[Expired for alsa-driver (Ubuntu) because there has been no activity for 60 days.]