#398 e1000e : huge power drain in Thinkpad T430s 82579LM

open
dertman
None
in-kernel_driver
1
2014-02-19
2014-01-31
johannes
No

The driver or the device is a power drain when not connected. Powertop reports power usage of over 10.8 W.

Lenovo Thinkpad T430s (2355c19)
Intel Gigabit 82579LM
mod: vermagic: 3.11.10-301.fc20.x86_64 SMP mod_unload
distro: Fedora 20
srcversion: 9B5F99EA311152C31E2E500

Related

Bugs: #398

Discussion

  • Did you ask the powertop list? It is mostly impossible for us to be using that much power.

    From: johannes [mailto:theking2@users.sf.net]
    Sent: Friday, January 31, 2014 9:16 AM
    To: Ticket 398
    Subject: [e1000:bugs] #398 e1000e : huge power drain in Thinkpad T430s 82579LM


    [bugs:#398]http://sourceforge.net/p/e1000/bugs/398/ e1000e : huge power drain in Thinkpad T430s 82579LM

    Status: open
    Created: Fri Jan 31, 2014 05:15 PM UTC by johannes
    Last Updated: Fri Jan 31, 2014 05:15 PM UTC
    Owner: nobody

    The driver or the device is a power drain when not connected. Powertop reports power usage of over 10.8 W.

    Lenovo Thinkpad T430s (2355c19)
    Intel Gigabit 82579LM
    mod: vermagic: 3.11.10-301.fc20.x86_64 SMP mod_unload
    distro: Fedora 20
    srcversion: 9B5F99EA311152C31E2E500


    Sent from sourceforge.net because you indicated interest in https://sourceforge.net/p/e1000/bugs/398/

    To unsubscribe from further messages, please visit https://sourceforge.net/auth/subscriptions/

     

    Related

    Bugs: #398

    Attachments
    • johannes
      johannes
      2014-02-02

      The 10 W was in a powertop list. I have a screenshot see :
      http://forums.fedoraforum.org/showpost.php?p=1686742&postcount=4

      Jesse Brandeburg schreef op vr 31-01-2014 om 18:05 [+0000]:

      Did you ask the powertop list? It is mostly impossible for us to be
      using that much power.

      From: johannes [mailto:theking2@users.sf.net]
      Sent: Friday, January 31, 2014 9:16 AM
      To: Ticket 398
      Subject: [e1000:bugs] #398 e1000e : huge power drain in Thinkpad T430s
      82579LM


      [bugs:#398]http://sourceforge.net/p/e1000/bugs/398/ e1000e : huge
      power drain in Thinkpad T430s 82579LM

      Status: open
      Created: Fri Jan 31, 2014 05:15 PM UTC by johannes
      Last Updated: Fri Jan 31, 2014 05:15 PM UTC
      Owner: nobody

      The driver or the device is a power drain when not connected. Powertop
      reports power usage of over 10.8 W.

      Lenovo Thinkpad T430s (2355c19)
      Intel Gigabit 82579LM
      mod: vermagic: 3.11.10-301.fc20.x86_64 SMP mod_unload
      distro: Fedora 20
      srcversion: 9B5F99EA311152C31E2E500


      Sent from sourceforge.net because you indicated interest in
      https://sourceforge.net/p/e1000/bugs/398/

      To unsubscribe from further messages, please visit
      https://sourceforge.net/auth/subscriptions/


      [bugs:#398] e1000e : huge power drain in Thinkpad T430s 82579LM

      Status: open
      Created: Fri Jan 31, 2014 05:15 PM UTC by johannes
      Last Updated: Fri Jan 31, 2014 05:15 PM UTC
      Owner: nobody

      The driver or the device is a power drain when not connected. Powertop
      reports power usage of over 10.8 W.

      Lenovo Thinkpad T430s (2355c19)
      Intel Gigabit 82579LM
      mod: vermagic: 3.11.10-301.fc20.x86_64 SMP mod_unload
      distro: Fedora 20
      srcversion: 9B5F99EA311152C31E2E500


      Sent from sourceforge.net because you indicated interest in
      https://sourceforge.net/p/e1000/bugs/398/

      To unsubscribe from further messages, please visit
      https://sourceforge.net/auth/subscriptions/

       

      Related

      Bugs: #398

  • Bruce Allan
    Bruce Allan
    2014-01-31

    Not a driver issue; this is a characteristic of the hardware. To reduce the power drain by the hardware, enable Runtime Power Management (RPM) for the device which will put it into the D3 power state whenever there is no link (powertop should have recommended that). RPM can be enabled for the device by:

    [root]# echo auto > /sys/devices/pci0000\:00/0000\:00\:19.0/power/control

    however, this setting is not persistent across reboots. See ./Documentation/power/runtime_pm.txt in the kernel source for more information, or search the web for Linux runtime power management.

     
  • Todd Fujinaka
    Todd Fujinaka
    2014-01-31

    Bruce is the expert, but a part as small as the 82579 drawing 11W would make itself quite evident by the magic smoke coming out of your system.

    The maximum power consumption is rated at ~ 0.7W. The datasheet should be available on intel.com

     
  • johannes
    johannes
    2014-01-31

    Yes i expect it to glow in the dark :-) which it doesn't. However, battery is drained rather quickly (compared to another OS-that-I-will-not-name)

    I had switched off the device and on again ( ip link set em1 up) and got the following screenshot. It might be that PowerTop is rather off but I just did a calibrate.

    PowerTOP 2.5      Overzicht  Rust stats   Frekwentie stats  Apparaat stats Tunables
    
    Summary: 381,7 wakeups/second,  101,0 GPU ops/seconds, 0,0 VFS ops/sec and 4,8% CPU use
    
    Power est.              Usage       Events/s    Category       Description
      5.95 W      0,0 pkts/s                Device         Network interface: wlp3s0 (iwlwifi)
      5.34 W    100,0%                      Device         Radio device: thinkpad_acpi
      1.76 W      0,0 pkts/s                Device         Network interface: em1 (e1000e)
      1.70 W     35,0%                      Device         Display backlight
      852 mW     35,0%                      Device         Display backlight
    
     
  • Todd Fujinaka
    Todd Fujinaka
    2014-02-19

    • assigned_to: dertman