[Expired for linux (Ubuntu) because there has been no activity for 60
days.]
** Changed in: linux (Ubuntu)
Status: Incomplete => Expired
--
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/862465
Title:
Webcam uses excessive power even when idle
Status in “linux” package in Ubuntu:
Expired
Bug description:
Machine is an HP Elitebook 8540w. It is equipped with a Chicony
webcam (USB ID 04f2:b15e). Powertop reported that this device was
using around 2W of power even when idle, despite the fact that
/sys/bus/usb/devices/XXX/power/level was reporting "auto". Explicitly
setting the power/level to auto caused it to go into sleep mode, and
powertop subsequently reported 0mW power consumption from the device.
Likewise, explicitly adding a udev rule to set the power level to auto
caused it to enter idle mode by default on bootup.
After explicit setting of power level to auto camera still functions
perfectly when needed and properly sleeps again after program exits.
2W is a significant amount of power even for this hog of a machine
(typically uses 26W).
ProblemType: Bug
DistroRelease: Ubuntu 11.10
Package: linux-image-3.0.0-12-generic 3.0.0-12.19
ProcVersionSignature: Ubuntu 3.0.0-12.19-generic 3.0.4
Uname: Linux 3.0.0-12-generic x86_64
NonfreeKernelModules: nvidia
AlsaVersion: Advanced Linux Sound Architecture Driver Version 1.0.24.
ApportVersion: 1.23-0ubuntu2
Architecture: amd64
ArecordDevices:
**** List of CAPTURE Hardware Devices ****
card 0: Intel [HDA Intel], device 0: STAC92xx Analog [STAC92xx Analog]
Subdevices: 1/1
Subdevice #0: subdevice #0
AudioDevicesInUse:
USER PID ACCESS COMMAND
/dev/snd/controlC1: jpeverill 2479 F.... pulseaudio
/dev/snd/controlC0: jpeverill 2479 F.... pulseaudio
CRDA: Error: [Errno 2] No such file or directory
Card0.Amixer.info:
Card hw:0 'Intel'/'HDA Intel at 0xd7520000 irq 61'
Mixer name : 'IDT 92HD75B3X5'
Components : 'HDA:111d7603,103c1521,00100202
HDA:11c11040,103c3066,00100200'
Controls : 14
Simple ctrls : 9
Card1.Amixer.info:
Card hw:1 'NVidia'/'HDA NVidia at 0xd3000000 irq 17'
Mixer name : 'Nvidia GPU 0d HDMI/DP'
Components : 'HDA:10de000d,10de0101,00100100'
Controls : 16
Simple ctrls : 4
Date: Thu Sep 29 10:54:23 2011
HibernationDevice: RESUME=UUID=225ce4fd-7e06-4c7c-937f-821d810a7487
MachineType: Hewlett-Packard HP EliteBook 8540w
PccardctlIdent:
Socket 0:
product info: "RICOH", "Bay8Controller", "", ""
manfid: 0x0000, 0x0000
function: 254 (unknown)
PccardctlStatus:
Socket 0:
3.3V 16-bit PC Card
Subdevice 0 (function 0) bound to driver "pata_pcmcia"
ProcEnviron:
SHELL=/bin/bash
PATH=(custom, user)
LANG=en_US.UTF-8
LANGUAGE=en_US:en
ProcKernelCmdLine: root=UUID=4a4cfeb0-ad39-4293-bcaf-000d6538b550 ro quiet
splash
RelatedPackageVersions:
linux-restricted-modules-3.0.0-12-generic N/A
linux-backports-modules-3.0.0-12-generic N/A
linux-firmware 1.60
SourcePackage: linux
StagingDrivers: mei
UpgradeStatus: Upgraded to oneiric on 2011-09-24 (4 days ago)
WpaSupplicantLog:
dmi.bios.date: 03/09/2011
dmi.bios.vendor: Hewlett-Packard
dmi.bios.version: 68CVD Ver. F.0F
dmi.board.name: 1521
dmi.board.vendor: Hewlett-Packard
dmi.board.version: KBC Version 32.33
dmi.chassis.type: 10
dmi.chassis.vendor: Hewlett-Packard
dmi.modalias:
dmi:bvnHewlett-Packard:bvr68CVDVer.F.0F:bd03/09/2011:svnHewlett-Packard:pnHPEliteBook8540w:pvr:rvnHewlett-Packard:rn1521:rvrKBCVersion32.33:cvnHewlett-Packard:ct10:cvr:
dmi.product.name: HP EliteBook 8540w
dmi.sys.vendor: Hewlett-Packard
To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/862465/+subscriptions
--
Mailing list: https://launchpad.net/~kernel-packages
Post to : kernel-packages@lists.launchpad.net
Unsubscribe : https://launchpad.net/~kernel-packages
More help : https://help.launchpad.net/ListHelp
