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[Bug 1301003] Re: kworker runs with 40-60% CPU because of modules e1000 and/or e1000e

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Hans Deragon, as per http://download.lenovo.com/express/ddfm.html an update to your BIOS is available (2.30). If you update to this following https://help.ubuntu.com/community/BiosUpdate does it change anything?  If it doesn't, could you please both specify what happened, and provide the output of the following terminal command:
sudo dmidecode -s bios-version && sudo dmidecode -s bios-release-date

Please note your current BIOS is already in the Bug Description, so
posting this on the old BIOS would not be helpful.

For more on BIOS updates and linux, please see
https://help.ubuntu.com/community/ReportingBugs#Bug_reporting_etiquette
.

Thank you for your understanding.

** Description changed:

- 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
+ Approximately once every two months, kworker runs with 40-60% CPU
+ because of kernel modules e1000 and/or e1000e. Rebooting the machine
+ does not help.
  
- 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.
+ WORKAROUND: Execute at a terminal:
+ sudo modprobe -r e1000
+ sudo modprobe -r e1000e
+ sudo modprobe e1000
+ sudo modprobe e1000e
  
  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
+  **** 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
+  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
+  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]
+  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
+  Socket 0:
+    no product info available
  PccardctlStatus:
-  Socket 0:
-    no card
+  Socket 0:
+    no card
  ProcEnviron:
-  LANGUAGE=en_CA:en
-  TERM=xterm
-  PATH=(custom, no user)
-  LANG=en_CA.UTF-8
-  SHELL=/bin/bash
+  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
+  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

-- 
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/1301003

Title:
  kworker runs with 40-60% CPU because of modules e1000 and/or e1000e

Status in “linux” package in Ubuntu:
  Incomplete

Bug description:
  Approximately once every two months, kworker runs with 40-60% CPU
  because of kernel modules e1000 and/or e1000e. Rebooting the machine
  does not help.

  WORKAROUND: Execute at a terminal:
  sudo modprobe -r e1000
  sudo modprobe -r e1000e
  sudo modprobe e1000
  sudo modprobe e1000e

  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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