[Bug 571770] Re: Thread [hd-audio0] consuming excessive amounts of CPU, audio crackling

[Øyvind Stegard]

** Bug watch removed: Linux Kernel Bug Tracker #15796
   http://bugzilla.kernel.org/show_bug.cgi?id=15796

** Description changed:

- Binary package hint: linux-image-2.6.32-21-generic
+ Binary package hint: linux-image-2.6.32-22-generic
  
  Sometimes during audio playback, a kernel thread named "[hd-audio0]"
  will consume excessive amounts of CPU and cause  audio crackling. It
  seems to be more easily triggered when displaying video in fullscreen
  (or Rhythmbox visualizations) or dragging windows around while playing
  music, somehow relating it graphics operations (running default radeon
  driver with KMS and Compiz).
  
  This all started after moving from Ubuntu Karmic to Lucid (never had
  this problem before).
  
  Setting package to kernel, since it's probably alsa snd_hda_intel kernel
  module which is to blame.
  
  Ubuntu 10.04 x86, Intel Core Duo 2GHz, 3GB RAM, ATI X1400 Radeon Mobility graphics.
  Audio chip: Analog Devices AD1981 [HDA]
  
  Attaching:
  * Screenshot of top running over Rhythmbox w/fullscreen visualizations, showing [hd-audio0] consuming more CPU than everything else at the time (audio crackles).
  * Output of "lspci -vvnn"
  * Output of "dmesg"
  * Contents of /proc/interrupts
  * ALSA info, as provided by the alsa-info.sh script.
  
  Related to this: https://bugzilla.kernel.org/show_bug.cgi?id=14935 ???

-- 
Thread [hd-audio0] consuming excessive amounts of CPU, audio crackling
https://bugs.launchpad.net/bugs/571770
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