Public bug reported:
Following these instructions.
Hi all,
"Luke and I have just pushed a one-line change to 9.10's
/etc/modprobe.d/alsa-base.conf that enables HDA controllers to power
down their amps after ten idle seconds. This change anticipates the
larger power-savings objectives for 9.10.
We expect there will be regressions in the form of audible pops when
the AMPs power down (and/or up). If you experience this symptom in
9.10, please file a bug using "ubuntu-bug alsa-base". Be sure to
change the summary of the bug afterward to "[9.10 regression] HDA
power_save=10".
Thanks,
Dan"
ProblemType: Bug
Architecture: i386
AudioDevicesInUse:
USER PID ACCESS COMMAND
/dev/snd/controlC0: dl 3212 F.... pulseaudio
Card0.Amixer.info:
Card hw:0 'Intel'/'HDA Intel at 0xf4780000 irq 16'
Mixer name : 'Analog Devices AD1981'
Components : 'HDA:11d41981,103c30ad,00100200
HDA:11c13026,103c30ad,00100700'
Controls : 13
Simple ctrls : 11
Date: Thu Sep 10 18:22:15 2009
DistroRelease: Ubuntu 9.10
Package: alsa-base 1.0.20+dfsg-1ubuntu4
PackageArchitecture: all
ProcEnviron:
LANG=en_US.UTF-8
SHELL=/bin/bash
ProcVersionSignature: Ubuntu 2.6.31-10.30-generic
SourcePackage: alsa-driver
Uname: Linux 2.6.31-10-generic i686
** Affects: alsa-driver (Ubuntu)
Importance: Undecided
Status: New
** Tags: apport-bug i386
--
[9.10 regression] HDA power_save=10
https://bugs.launchpad.net/bugs/427645
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