This change was made by a bot.
** Changed in: linux (Ubuntu)
Status: New => Confirmed
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https://bugs.launchpad.net/bugs/1301003
Title:
kworker runs with 40-60% CPU because of modules e1000 and/or e1000e
Status in “linux” package in Ubuntu:
Confirmed
Bug description:
Once in a blue moon, lets say once every two months, kworker runs with
40-60% CPU because of kernel modules e1000 and/or e1000e. Reboot the
machine does not help. I rebooted twice to no avail
I then ran:
sudo modprobe -r e1000
sudo modprobe -r e1000e
and the problem was gone.
When I run the following afterwards:
sudo modprobe e1000
sudo modprobe e1000e
... the kworker ran for less than 1s and exited.
This particular problem was already reported in bug #887739.
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/887793
but was not the problem of the person that reported it, thus this new
bug report.
ProblemType: Bug
DistroRelease: Ubuntu 12.04
Package: linux-image-3.2.0-60-generic 3.2.0-60.91
ProcVersionSignature: Ubuntu 3.2.0-60.91-generic 3.2.55
Uname: Linux 3.2.0-60-generic x86_64
NonfreeKernelModules: nvidia
AlsaVersion: Advanced Linux Sound Architecture Driver Version 1.0.24.
ApportVersion: 2.0.1-0ubuntu17.6
Architecture: amd64
ArecordDevices:
**** List of CAPTURE Hardware Devices ****
card 0: Intel [HDA Intel], device 0: AD198x Analog [AD198x Analog]
Subdevices: 2/2
Subdevice #0: subdevice #0
Subdevice #1: subdevice #1
Card0.Amixer.info:
Card hw:0 'Intel'/'HDA Intel at 0xfe220000 irq 49'
Mixer name : 'Analog Devices AD1984'
Components : 'HDA:11d41984,17aa20bb,00100400'
Controls : 32
Simple ctrls : 20
Card29.Amixer.info:
Card hw:29 'ThinkPadEC'/'ThinkPad Console Audio Control at EC reg 0x30, fw
7KHT22WW-1.06'
Mixer name : 'ThinkPad EC 7KHT22WW-1.06'
Components : ''
Controls : 1
Simple ctrls : 1
Card29.Amixer.values:
Simple mixer control 'Console',0
Capabilities: pswitch pswitch-joined penum
Playback channels: Mono
Mono: Playback [on]
Date: Tue Apr 1 16:31:37 2014
HibernationDevice: RESUME=UUID=3b244221-fe9e-429c-8bd3-c541dbf92fcc
InstallationMedia: Ubuntu 12.04 LTS "Precise Pangolin" - Release amd64
(20120425)
MachineType: LENOVO 646066U
MarkForUpload: True
PccardctlIdent:
Socket 0:
no product info available
PccardctlStatus:
Socket 0:
no card
ProcEnviron:
LANGUAGE=en_CA:en
TERM=xterm
PATH=(custom, no user)
LANG=en_CA.UTF-8
SHELL=/bin/bash
ProcFB:
ProcKernelCmdLine: BOOT_IMAGE=/vmlinuz-3.2.0-60-generic
root=/dev/mapper/hostname-root ro quiet splash nmi_watchdog=0
RelatedPackageVersions:
linux-restricted-modules-3.2.0-60-generic N/A
linux-backports-modules-3.2.0-60-generic N/A
linux-firmware 1.79.11
SourcePackage: linux
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 06/27/2007
dmi.bios.vendor: LENOVO
dmi.bios.version: 7LET44WW (1.14 )
dmi.board.name: 646066U
dmi.board.vendor: LENOVO
dmi.board.version: Not Available
dmi.chassis.asset.tag: No Asset Information
dmi.chassis.type: 10
dmi.chassis.vendor: LENOVO
dmi.chassis.version: Not Available
dmi.modalias:
dmi:bvnLENOVO:bvr7LET44WW(1.14):bd06/27/2007:svnLENOVO:pn646066U:pvrThinkPadT61:rvnLENOVO:rn646066U:rvrNotAvailable:cvnLENOVO:ct10:cvrNotAvailable:
dmi.product.name: 646066U
dmi.product.version: ThinkPad T61
dmi.sys.vendor: LENOVO
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