PowerManagementASPM

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[[http://zinc.canonical.com/~cking/powermanagement/mjgaspmfix/oneiric|Oneiric Kernels]]
[[http://zinc.canonical.com/~cking/powermanagement/mjgaspmfix/precise|Precise Kernels]]
 * [[http://zinc.canonical.com/~cking/powermanagement/mjgaspmfix/oneiric|Ubuntu Oneiric 11.10 Kernels]]
 * [[http://zinc.canonical.com/~cking/powermanagement/mjgaspmfix/precise|Ubuntu Precise 12.04 Kernels]]

For power measurement, we currently recommend using the older version of powertop 1.13 as this clearly displays the ACPI estimated power consumption. A .deb for this can be found [[https://launchpad.net/~lool/+archive/ppa/+sourcepub/2073115/+listing-archive-extra|here]]. We recommend running powertop as follows:

 * Boot the machine, start powertop 1.13
 * Wait until you get an ACPI estimated power consumption value.
 * Gather 15 measurements (it is updated regularly).
 * Discard the 5 results.
 * Take average of the last 10 results.
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 * Run powertop for 10 minutes on an idle system and note power consumption  * Run powertop on an idle system and note power consumption
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 * Run powertop for 10 minutes on an idle system and note power consumption  * Run powertop on an idle system and note power consumption
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Please try and keep table in sorted order on the machine name. Thanks!
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||Example||68ET27WW||64||3.1.0-2-generic||23W||3.1.0-2-generic||19W|| ||HP Mini 210||F0.2||64||3.0.0-12-generic||14.3W||3.0.0-13-generic||8.7W||
||HP Pro``Book 5420s||68AZZ Ver. F.0F||64||3.0.0-12-generic||25.06W||3.0.0-13-generic||25.66W||
||Lenovo 3000N200||68ET27WW||64||3.1.0-2-generic||24.3W||3.1.0-2-generic||25.4W||
||Lenovo Thinkpad X301||`6EET54WW (3.14 )`||64||3.1.0-2-generic||11.4W||3.1.0-2-generic||11.4W||

ASPM PCIe Bug

As noted by Phoronix ASPM PCIe power saving has been problematic and a recent patch by Matthew Garrett has re-worked this to clear the ASPM state on all devices on a successful handoff of PCIe control to the OS.

We therefore are providing patched kernels carrying Matthew's fix for testing purposes only to see how well this works across a broad range of machines. Kernels can be found in:

For power measurement, we currently recommend using the older version of powertop 1.13 as this clearly displays the ACPI estimated power consumption. A .deb for this can be found here. We recommend running powertop as follows:

  • Boot the machine, start powertop 1.13
  • Wait until you get an ACPI estimated power consumption value.
  • Gather 15 measurements (it is updated regularly).
  • Discard the 5 results.
  • Take average of the last 10 results.

Testing procedure:

  • Ensure laptop is fully charged
  • Unplug AC power
  • Run powertop on an idle system and note power consumption
  • Plug in AC power
  • Install the new kernel containing the ASPM fix
  • Ensure laptop is fully charged
  • Unplug AC power
  • Run powertop on an idle system and note power consumption
  • Gather the BIOS version using: sudo dmidecode -t 0 | grep "Version:"
  • Add results to the table below:

Please try and keep table in sorted order on the machine name. Thanks!

Machine

BIOS

32/64 bit kernel

Original Kernel

Original Kernel Power

ASPM fix Kernel

ASPM fix Power

HP Mini 210

F0.2

64

3.0.0-12-generic

14.3W

3.0.0-13-generic

8.7W

HP ProBook 5420s

68AZZ Ver. F.0F

64

3.0.0-12-generic

25.06W

3.0.0-13-generic

25.66W

Lenovo 3000N200

68ET27WW

64

3.1.0-2-generic

24.3W

3.1.0-2-generic

25.4W

Lenovo Thinkpad X301

6EET54WW (3.14 )

64

3.1.0-2-generic

11.4W

3.1.0-2-generic

11.4W

Kernel/PowerManagementASPM (last edited 2012-02-19 14:59:07 by costing)