kernel-packages team mailing list archive

[Len Ovens <len@xxxxxxxxxxxxx>]

On Fri, 21 Mar 2014, Colin King wrote:

> Can you attach /etc/pulse/daemon.conf  to the bug report.  We're seeing
> audio buffer overruns, so it would be useful to see what the pulse audio
> settings are.

It occures to me that I may have been testing kernel latency as the -17 
version seemed worse than 13.10 had been. That is pulse->jackd bridge may 
have been running with jackd set to -p64 (2.67 ms as jackd reports) which 
is below the latency most Intel HDA setups are able to handle (-p128 is 
the normal lower limit). There were certainly xruns as this is at the edge 
of where things work with hyperthreading turned on. (hyperthreading off 
gives sub ms latency)

All reboots since then have not had jackd started and still had kernel 
errors.

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https://bugs.launchpad.net/bugs/1294729

Title:
  BUG: pcmC1D0c:0, pos = 5461, buffer size = 5461, period size = 2730

Status in “linux” package in Ubuntu:
  Confirmed

Bug description:
  Bug keeps showing up every 5 10 min or so.

  ProblemType: KernelOops
  DistroRelease: Ubuntu 14.04
  Package: linux-image-3.13.0-18-lowlatency 3.13.0-18.38
  ProcVersionSignature: Ubuntu 3.13.0-18.38-lowlatency 3.13.6
  Uname: Linux 3.13.0-18-lowlatency i686
  NonfreeKernelModules: nvidia
  Annotation: Your system might become unstable now and might need to be restarted.
  ApportVersion: 2.13.3-0ubuntu1
  Architecture: i386
  Date: Wed Mar 19 08:27:54 2014
  Failure: oops
  HibernationDevice: RESUME=UUID=56da38ca-265b-4e0d-b599-dc779f722a9f
  InstallationDate: Installed on 2014-03-15 (3 days ago)
  InstallationMedia: Ubuntu-Studio 14.04 "Trusty Tahr" - Alpha i386 (20140314)
  IwConfig:
   lo        no wireless extensions.
   
   eth0      no wireless extensions.
  ProcFB:
   
  ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.13.0-18-lowlatency root=UUID=27ae0d6e-3c3c-49a2-8d67-6c5a58a1e8e4 ro quiet splash
  PulseList: Error: command ['pacmd', 'list'] failed with exit code 1: No PulseAudio daemon running, or not running as session daemon.
  RelatedPackageVersions: kerneloops-daemon 0.12+git20090217-3ubuntu6
  RfKill:
   
  SourcePackage: linux
  Title: BUG: pcmC1D0c:0, pos = 5461, buffer size = 5461, period size = 2730
  UpgradeStatus: No upgrade log present (probably fresh install)
  dmi.bios.date: 04/27/2004
  dmi.bios.vendor: Phoenix Technologies, LTD
  dmi.bios.version: 6.00 PG
  dmi.board.name: IC7/IC7-G(Intel i875P-ICH5)
  dmi.board.vendor: http://www.abit.com.tw/
  dmi.board.version: 1.0/1.1
  dmi.chassis.type: 3
  dmi.modalias: dmi:bvnPhoenixTechnologies,LTD:bvr6.00PG:bd04/27/2004:svn:pn:pvr:rvnhttp//www.abit.com.tw/:rnIC7/IC7-G(Inteli875P-ICH5):rvr1.0/1.1:cvn:ct3:cvr:

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