Crackling / scratching noise using Pulseaudio
Affects | Status | Importance | Assigned to | Milestone | |
---|---|---|---|---|---|
PulseAudio |
New
|
Undecided
|
Unassigned | ||
linux (Ubuntu) |
Won't Fix
|
Medium
|
Daniel T Chen | ||
Jaunty |
Fix Released
|
Medium
|
Daniel T Chen |
Bug Description
Jaunty SRU information follows:
Impact: Users of certain Intel8x0 and Intel HDA controllers are experiencing crackling and popping while playing audio files. These symptoms appear when the mixer elements are unmuted. These anomalies are due to buffering and clock adjustment calculations that incorrectly assume that the underlying hardware is well-behaved.
Resolution/Fix: Improve the buffering and clock calculations by providing more conservative floors and ceilings. Changes are backported from linux-2.6.git and alsa-kmirror.git. Provenance is given in the commits listed below in the Changesets section. Users have fared well using test kernels from http://
The original proposal is available at https:/
Test case: If one's audio hardware is among the affected Intel8x0- or Intel HDA-based, simply playing music in GNOME using Rhythmbox will expose this behaviour.
Changesets:
- http://
- http://
- http://
ACKs:
- https:/
- https:/
Regression potential: Theoretically, there is extremely low probability for regression, as these patches simply remove the assumptions that the underlying hardware is well-behaved. Practically, users of jack-audio-
--
Original bug information follows:
I hope this isn't a dupe. A few people (myself included) are experiencing odd crackling / scratching noises when using pulseaudio. This frequently happens when you try to start a new piece of music or video. Sometimes it will crackle for a few seconds, then play as normal; sometimes it will fast-forward through a few minutes of the song then start playing; sometimes it will crackle then stop entirely and I have to kill pa.
Here's a URL of my output of alsa-info.sh: http://
Here's a link to the ongoing thread at ubuntuforums: http://
I have pulseaudio 0.9.14 from the main jaunty server.
ProblemType: Bug
Architecture: i386
DistroRelease: Ubuntu 9.04
MachineType: Packard Bell BV EasyNote MB85
NonfreeKernelMo
Package: linux-image-
ProcCmdLine: root=UUID=
ProcEnviron:
LANG=en_GB.UTF-8
SHELL=/bin/bash
ProcVersionSign
SourcePackage: linux
Changed in linux (Ubuntu): | |
assignee: | nobody → Daniel T Chen (crimsun) |
status: | Confirmed → In Progress |
description: | updated |
Changed in linux (Ubuntu): | |
status: | In Progress → Fix Committed |
tags: | added: verification-needed |
Changed in linux (Ubuntu Jaunty): | |
status: | New → Fix Committed |
tags: |
added: verification-done removed: verification-needed |
tags: |
added: hw-specific verification-needed removed: verification-done |
Changed in linux (Ubuntu Jaunty): | |
status: | Fix Committed → Confirmed |
tags: |
added: verification-failed removed: verification-needed |
Changed in linux (Ubuntu): | |
status: | Fix Committed → Triaged |
Changed in linux (Ubuntu Jaunty): | |
assignee: | nobody → Daniel T Chen (crimsun) |
importance: | Undecided → Medium |
status: | Confirmed → Triaged |
Changed in pulseaudio: | |
status: | New → Opinion |
Changed in pulseaudio: | |
status: | Opinion → New |
Changing to confirmed as affected also.