** Description changed: + 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://kernel.ubuntu.com/~dtchen/. + + The original proposal is available at https://lists.ubuntu.com/archives + /kernel-team/2009-April/005405.html. + + 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://kernel.ubuntu.com/git?p=dtchen/ubuntu-jaunty.git;a=commit;h=b77756ea8b7c973af68258febd7cd11d4b88893a + - http://kernel.ubuntu.com/git?p=dtchen/ubuntu-jaunty.git;a=commit;h=c5197004ef2b0c4ebfb0fcb68715a0fce4c39cad + - http://kernel.ubuntu.com/git?p=dtchen/ubuntu-jaunty.git;a=commit;h=3ed92131e73867a5fb6064642fd6873fcd194d75 + + ACKs: + - https://lists.ubuntu.com/archives/kernel-team/2009-April/005414.html + - https://lists.ubuntu.com/archives/kernel-team/2009-April/005427.html + + 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- + connection-kit (JACK) and other native ALSA apps [not routed through + PulseAudio as is the default in Ubuntu] may notice changes in jitter. + Testing since Jaunty's release has revealed no regressions. + + -- + 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://www.alsa- project.org/db/?f=44dc1549d60508bd181a03ee1c65465aa5c9024d Here's a link to the ongoing thread at ubuntuforums: http://ubuntuforums.org/showthread.php?t=1084919&page=4 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 NonfreeKernelModules: nvidia Package: linux-image-2.6.28-11-generic 2.6.28-11.35 ProcCmdLine: root=UUID=36b4053e-7e48-4a1a-8666-b63058a30816 ro quiet splash ProcEnviron: LANG=en_GB.UTF-8 SHELL=/bin/bash ProcVersionSignature: Ubuntu 2.6.28-11.35-generic SourcePackage: linux
-- Crackling / scratching noise using Pulseaudio https://bugs.launchpad.net/bugs/345627 You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
