kernel-packages team mailing list archive
-
kernel-packages team
-
Mailing list archive
-
Message #100158
[Bug 571770]
According to bug 38694 there can be problems when changing the number of
PCIe lanes. Does disabling that as described there help for this
problem?
--
You received this bug notification because you are a member of Kernel
Packages, which is subscribed to linux in Ubuntu.
https://bugs.launchpad.net/bugs/571770
Title:
Thread [hd-audio0] consuming excessive amounts of CPU, audio crackling
Status in linux package in Ubuntu:
Confirmed
Bug description:
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]
WORKAROUND: Disabling radeon KMS makes all the audio crackling go
away.
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 ???
To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/571770/+subscriptions