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Message #08945
[Bug 1213719] Re: [Samsung NP900X3D-A03IT] Powertop shows 100% Device Usage for audio codecs
In that state the two codecs drain about 2W to 3W of power. About the
15% of the whole power consumption of this laptop. This constant usage
has an impact on the temperature of the computer, so that the process
must run slower in order not to exceed its temperature envelope.
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https://bugs.launchpad.net/bugs/1213719
Title:
[Samsung NP900X3D-A03IT] Powertop shows 100% Device Usage for audio
codecs
Status in “linux” package in Ubuntu:
Confirmed
Bug description:
powertop reports that two audio codecs are both up 100% of the time,
even when no sound is playing.
100,0% Audio codec hwC0D0: Realtek
100,0% Audio codec hwC0D3: Intel
This happens on a Samsung Series 9 NP900X3D-A03IT.
ProblemType: Bug
DistroRelease: Ubuntu 12.04
Package: linux-image-3.5.0-37-generic 3.5.0-37.58~precise1
ProcVersionSignature: Ubuntu 3.5.0-37.58~precise1-generic 3.5.7.16
Uname: Linux 3.5.0-37-generic x86_64
AlsaVersion: Advanced Linux Sound Architecture Driver Version 1.0.25.
ApportVersion: 2.0.1-0ubuntu17.4
Architecture: amd64
ArecordDevices:
**** List of CAPTURE Hardware Devices ****
card 0: PCH [HDA Intel PCH], device 0: ALC269VC Analog [ALC269VC Analog]
Subdevices: 1/1
Subdevice #0: subdevice #0
AudioDevicesInUse:
USER PID ACCESS COMMAND
/dev/snd/controlC0: gioele 1759 F.... pulseaudio
Card0.Amixer.info:
Card hw:0 'PCH'/'HDA Intel PCH at 0xf0700000 irq 50'
Mixer name : 'Intel PantherPoint HDMI'
Components : 'HDA:10ec0269,144dc0d3,00100202 HDA:80862806,80860101,00100000'
Controls : 25
Simple ctrls : 11
Date: Sun Aug 18 22:42:34 2013
HibernationDevice: RESUME=UUID=7e63a512-9a2c-4503-9bd9-ec2f74a7f029
InstallationMedia: Ubuntu 12.04.2 LTS "Precise Pangolin" - Release amd64 (20130504)
MachineType: SAMSUNG ELECTRONICS CO., LTD. 900X3C/900X3D/900X3E/900X4C/900X4D
MarkForUpload: True
ProcFB: 0 inteldrmfb
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.5.0-37-generic root=UUID=9d6c757c-fda7-49cb-9e7c-e382ebdc4d53 ro quiet splash vt.handoff=7
RelatedPackageVersions:
linux-restricted-modules-3.5.0-37-generic N/A
linux-backports-modules-3.5.0-37-generic N/A
linux-firmware 1.79.6
SourcePackage: linux
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 04/09/2013
dmi.bios.vendor: Phoenix Technologies Ltd.
dmi.bios.version: P07ABK
dmi.board.asset.tag: Base Board Asset Tag
dmi.board.name: NP900X3D-A03IT
dmi.board.vendor: SAMSUNG ELECTRONICS CO., LTD.
dmi.board.version: FAB1
dmi.chassis.asset.tag: No Asset Tag
dmi.chassis.type: 9
dmi.chassis.vendor: SAMSUNG ELECTRONICS CO., LTD.
dmi.chassis.version: 0.1
dmi.modalias: dmi:bvnPhoenixTechnologiesLtd.:bvrP07ABK:bd04/09/2013:svnSAMSUNGELECTRONICSCO.,LTD.:pn900X3C/900X3D/900X3E/900X4C/900X4D:pvr0.1:rvnSAMSUNGELECTRONICSCO.,LTD.:rnNP900X3D-A03IT:rvrFAB1:cvnSAMSUNGELECTRONICSCO.,LTD.:ct9:cvr0.1:
dmi.product.name: 900X3C/900X3D/900X3E/900X4C/900X4D
dmi.product.version: 0.1
dmi.sys.vendor: SAMSUNG ELECTRONICS CO., LTD.
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References