[Bug 618348] [NEW] 2.6.35-15~lucid1 doesn't allow audio device to powerdown

[Geoffrey Hausheer]

Public bug reported:

When trying the 2.6.35~lucid1 backport kernel in 10.04, the Audio device
doesn't auto powerdown after a reboot.

powertop reports:

An audio device is active 100.0% of the time:
hwC0D0 Realtek ALC272X

Once I mute/unmute the audio, the device will drop into power-savings
mode when unused, and powertop report 'device is active 0% of the time'
when it isn't in use, and will stay this way until the next reboot.

Using the default kernel (2.6.32-24), the device properly enters power-
savings mode after a reboot:

Recent audio activity statistics
Active  Device name
  0.0%  hwC0D0 Realtek ALC272

ProblemType: Bug
DistroRelease: Ubuntu 10.04
Package: linux-image-2.6.32-24-generic 2.6.32-24.39
Regression: Yes
Reproducible: Yes
ProcVersionSignature: Ubuntu 2.6.32-24.39-generic 2.6.32.15+drm33.5
Uname: Linux 2.6.32-24-generic i686
AlsaVersion: Advanced Linux Sound Architecture Driver Version 1.0.21.
AplayDevices:
 **** List of PLAYBACK Hardware Devices ****
 card 0: Intel [HDA Intel], device 0: ALC272 Analog [ALC272 Analog]
   Subdevices: 1/1
   Subdevice #0: subdevice #0
Architecture: i386
ArecordDevices:
 **** List of CAPTURE Hardware Devices ****
 card 0: Intel [HDA Intel], device 0: ALC272 Analog [ALC272 Analog]
   Subdevices: 1/1
   Subdevice #0: subdevice #0
AudioDevicesInUse:
 USER        PID ACCESS COMMAND
 /dev/snd/controlC0:  ghaushe    1254 F.... pulseaudio
CRDA: Error: [Errno 2] No such file or directory
Card0.Amixer.info:
 Card hw:0 'Intel'/'HDA Intel at 0x58200000 irq 16'
   Mixer name	: 'Realtek ALC272'
   Components	: 'HDA:10ec0272,10250349,00100001'
   Controls      : 14
   Simple ctrls  : 8
Date: Sun Aug 15 12:50:46 2010
HibernationDevice: RESUME=UUID=959d80ef-e27e-44be-a081-3fd67173fda3
InstallationMedia: Ubuntu-Netbook 10.04 "Lucid Lynx" - Release i386 (20100429.4)
MachineType: Acer AO532h
ProcCmdLine: BOOT_IMAGE=/boot/vmlinuz-2.6.32-24-generic root=UUID=f5127df7-0d63-42db-af5b-2b68df4a8ce0 ro quiet splash
ProcEnviron:
 SHELL=/bin/bash
 LANG=en_US.UTF-8
RelatedPackageVersions: linux-firmware 1.34.1
RfKill:
 0: phy0: Wireless LAN
 	Soft blocked: no
 	Hard blocked: no
SourcePackage: linux
dmi.bios.date: 06/15/2010
dmi.bios.vendor: Acer
dmi.bios.version: V1.25
dmi.board.asset.tag: Base Board Asset Tag
dmi.board.name: AO532h
dmi.board.vendor: Acer
dmi.board.version: V1.25
dmi.chassis.type: 10
dmi.chassis.vendor: Acer
dmi.chassis.version: V1.25
dmi.modalias: dmi:bvnAcer:bvrV1.25:bd06/15/2010:svnAcer:pnAO532h:pvrV1.25:rvnAcer:rnAO532h:rvrV1.25:cvnAcer:ct10:cvrV1.25:
dmi.product.name: AO532h
dmi.product.version: V1.25
dmi.sys.vendor: Acer

** Affects: linux (Ubuntu)
     Importance: Undecided
         Status: New


** Tags: apport-bug audio i386 lucid needs-upstream-testing regression-potential ubuntu-une

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2.6.35-15~lucid1 doesn't allow audio device to powerdown
https://bugs.launchpad.net/bugs/618348
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