Battery drain, possible due to USB Selective Suspend=

Discussion in 'Microsoft Surface Pro 2' started by Expecho, Apr 23, 2014.

  1. Expecho

    Expecho New Member

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    Hi there,



    I have some problems with my device, the biggest being the battery life. When using it for only browsing it keeps up for about 5.5 hours then it is empty. Since I do use a mircoSD card I always fully shutdown my tablet. It's up to date with all firmware and windows updates applied. When running powercfg /energyreport I get 1 or 2 errors, depending on whether my Type Cover 2 is attached or not. When not attached I only get the first record in the tables below, otherwise I get two. Does this error indicate an (hardware) errors that can affect battery life and if so, what can I do about it?



    Best regards,

    Peter
    --------------------------------------------------------------------------------------------------------





    USB onderbreken:USB-apparaat wordt niet selectief
    onderbroken


    Voor dit apparaat is de status USB selectief
    onderbroken niet geactiveerd. Energiebeheer voor de processor wordt mogelijk
    verhinderd als dit USB-apparaat niet selectief wordt onderbroken. Dit verhindert
    niet dat het systeem in de slaapstand gaat.

    Apparaatnaam Samengesteld USB-apparaat
    Hostcontroller-id PCI\VEN_8086&DEV_9C31
    Locatie van hostcontroller PCI bus 0, device 20, function 0
    Apparaat-id USB\VID_1286&PID_2044
    Pad van poort 2



    USB onderbreken:USB-apparaat wordt niet selectief
    onderbroken


    Voor dit apparaat is de status USB selectief
    onderbroken niet geactiveerd. Energiebeheer voor de processor wordt mogelijk
    verhinderd als dit USB-apparaat niet selectief wordt onderbroken. Dit verhindert
    niet dat het systeem in de slaapstand gaat.

    Apparaatnaam Samengesteld USB-apparaat
    Hostcontroller-id PCI\VEN_8086&DEV_9C31
    Locatie van hostcontroller PCI bus 0, device 20, function 0
    Apparaat-id USB\VID_045E&PID_0799
    Pad van poort 3
     
  2. GoodBytes

    GoodBytes Well-Known Member

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    Your web browser affects your battery life. Chrome is more power hungry. Try Firefox or IE11 desktop.
    You can also try Ad-Block-Plus add-on for Firefox and block ads. Many ads are in poorly made in Flash (many times it's designers making them, not programmers), which are CPU taxing.
    If you use the add-on, I do encourage to put to site that you visit often and participate in, part of the white list to block ads, to support them. They need income to be able to bring food on their table and continue to operate and provide you content you like and support.

    Also, watching videos in your web session, also reduces battery life. Lastly, you have to consider the brightness of the screen, and if you have any Bluetooth connected devices which all consumer more power.

    As for the report. I can't read German. But if they are warnings, I have 1 on my side, same Hostcontroller. I have identify it as being the Intel USB 3.0 eXtensible Host controller - 0100 (Microsoft)
    I have no errors with my Type Cover 2 when I do powercfg -report command.

    Here is my full report.
    http://www.helpweaver.com/energy-report.html


    Without changing your setup, the warnings may increase and decrease in number. Errors should not.
     
    Last edited: Apr 23, 2014
  3. kristalsoldier

    kristalsoldier Well-Known Member

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    @GoodBytes...on the subject of browsers and your recommendation to use IE11 (desktop), would you say that the Modern UI version of IE11 is also power hungry? How to check this?
     
  4. Jasmine

    Jasmine Member

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    That might be normal battery life.
    I get around 3.5 hours, maybe closer to 4 on a good day and I use Firefox.
     
  5. GoodBytes

    GoodBytes Well-Known Member

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    ModernUI apps uses the GPU to render its interface. While normally it's good, and that is what you want. Sadly, it's a bit too much for Intel integrated graphics.
    It's not a drastic battery difference, but I want you to get the max as a starting point.


    Another thing you can do is set the device to Power Saver power plan, and set the in plan advance settings, the maximum and minimum processor state (see under "Processor Power Management"), to 0% to force the CPU at 750MHz.
     
    Last edited: Apr 24, 2014
  6. kristalsoldier

    kristalsoldier Well-Known Member

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    Thanks.
     
  7. javispedro

    javispedro Member

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    I would be surprised if Metro IE used more battery life than Desktop IE.

    IE uses acceleration in both modes. In fact, the GPU is always used ever since Vista days. But Metro IE is more strict when suspending JavaScript timers. etc.
     
  8. GoodBytes

    GoodBytes Well-Known Member

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    Anyway, try and see. I mean don't use Chrome, using something else.
    I was just being safe when I said desktop version
     
  9. jnjroach

    jnjroach Administrator Staff Member

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    In Microsoft's on internal/external testing Modern UI Apps typically use between 20-30% less battery than Win32 equivalents.....mainly due to the use of WinRT and the ability to use Managed or Native Code (now open to all developers using the new Native Compiler).
     
  10. Philtastic

    Philtastic Active Member

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    Yeah, I find Modern UI apps, particularly IE and Video, use up to 30-50% less battery than desktop programs, most notably VLC player, in the rough comparison that I'm making.
     
  11. Expecho

    Expecho New Member

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    We are talking about the pro 2 aren't we? should it not last quit a bit longer?
     
  12. Expecho

    Expecho New Member

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    I only use the metro internet explorer browser, so that should be ok.

    I wonder what devices causes the errors, hard to tell.
     

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