2.6.35-15~lucid1 doesn't allow audio device to powerdown
Affects | Status | Importance | Assigned to | Milestone | |
---|---|---|---|---|---|
linux-lts-backport-maverick (Ubuntu) |
Confirmed
|
Undecided
|
Unassigned |
Bug Description
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-
Regression: Yes
Reproducible: Yes
ProcVersionSign
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/
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,
Controls : 14
Simple ctrls : 8
Date: Sun Aug 15 12:50:46 2010
HibernationDevice: RESUME=
InstallationMedia: Ubuntu-Netbook 10.04 "Lucid Lynx" - Release i386 (20100429.4)
MachineType: Acer AO532h
ProcCmdLine: BOOT_IMAGE=
ProcEnviron:
SHELL=/bin/bash
LANG=en_US.UTF-8
RelatedPackageV
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.
dmi.board.name: AO532h
dmi.board.vendor: Acer
dmi.board.version: V1.25
dmi.chassis.type: 10
dmi.chassis.vendor: Acer
dmi.chassis.
dmi.modalias: dmi:bvnAcer:
dmi.product.name: AO532h
dmi.product.
dmi.sys.vendor: Acer
---
AlsaVersion: Advanced Linux Sound Architecture Driver Version 1.0.23.
AplayDevices:
**** List of PLAYBACK Hardware Devices ****
card 0: Intel [HDA Intel], device 0: ALC272X Analog [ALC272X Analog]
Subdevices: 1/1
Subdevice #0: subdevice #0
Architecture: i386
ArecordDevices:
**** List of CAPTURE Hardware Devices ****
card 0: Intel [HDA Intel], device 0: ALC272X Analog [ALC272X Analog]
Subdevices: 1/1
Subdevice #0: subdevice #0
AudioDevicesInUse:
USER PID ACCESS COMMAND
/dev/snd/
CRDA: Error: [Errno 2] No such file or directory
Card0.Amixer.info:
Card hw:0 'Intel'/'HDA Intel at 0x58200000 irq 45'
Mixer name : 'Realtek ALC272X'
Components : 'HDA:10ec0272,
Controls : 14
Simple ctrls : 8
DistroRelease: Ubuntu 10.04
HibernationDevice: RESUME=
InstallationMedia: Ubuntu-Netbook 10.04 "Lucid Lynx" - Release i386 (20100429.4)
MachineType: Acer AO532h
Package: linux (not installed)
ProcCmdLine: BOOT_IMAGE=
ProcEnviron:
LANG=en_US.UTF-8
SHELL=/bin/bash
ProcVersionSign
Regression: Yes
RelatedPackageV
Reproducible: Yes
RfKill:
0: phy0: Wireless LAN
Soft blocked: no
Hard blocked: no
Tags: ubuntu-une lucid audio regression-
Uname: Linux 2.6.35-15-generic i686
UserGroups: adm admin cdrom dialout lpadmin plugdev sambashare
dmi.bios.date: 06/15/2010
dmi.bios.vendor: Acer
dmi.bios.version: V1.25
dmi.board.
dmi.board.name: AO532h
dmi.board.vendor: Acer
dmi.board.version: V1.25
dmi.chassis.type: 10
dmi.chassis.vendor: Acer
dmi.chassis.
dmi.modalias: dmi:bvnAcer:
dmi.product.name: AO532h
dmi.product.
dmi.sys.vendor: Acer
tags: | added: acpi-parameter |
Changed in linux (Ubuntu): | |
status: | New → Confirmed |
tags: | removed: regression-potential |
affects: | linux (Ubuntu) → linux-lts-backport-maverick (Ubuntu) |
apport information