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    Adaptive (Dynamic Switching)

    Discussion in 'VAIO / Sony' started by avicenne13, Feb 22, 2006.

  1. avicenne13

    avicenne13 Notebook Geek

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    I have a question.

    When I choose the battery option on vaio power management for my type S, the CPU value constantly shows 800 mhz on a 1.86 centrino.

    On the other hand, when I choose the adaptive option, AFAIK, the CPU speed should always be between 800-1.86. However, the CPU speed drops down to 360 mhz on some occasions, and the system slow down dramatically.

    What is the logic behind this? Does anyone know?
     
    avicenne13, Feb 22, 2006
    #1
  2. Sprogo

    Sprogo Notebook Enthusiast

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    I think the idea behind it was to "preserve" battery life, but it can only be a few minutes extra...I dont see the point meself...
     
    Sprogo, Feb 22, 2006
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  3. wpuk

    wpuk Notebook Geek

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    it shouldnt drop below the base speed so somethings up, this is a guess but you could try installing the bios again, if that doesnt work is it still under warranty
     
    wpuk, Feb 22, 2006
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  4. Charles P. Jefferies

    Charles P. Jefferies Lead Moderator Super Moderator

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    Be very careful with the BIOS upgrade.

    I'd download MobileMeter, run that, it will graph your frequency.

    The processor goes to 800Mhz to conserve power, and will adjust its speed as necessary.
     
    Charles P. Jefferies, Feb 22, 2006
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  5. Bomfunk

    Bomfunk Notebook Consultant

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    Well I found a similiar behaviour before I started using NHC and upgrading my bios. 360Mhz slows the notebook down a lot, I know what you mean.
    I'm not exactly sure but I think installing the latest BIOS made this behaviour go away, what version do you have installed?
     
    Bomfunk, Feb 22, 2006
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  6. avicenne13

    avicenne13 Notebook Geek

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    I have the latest bios as far as I know.

    I am measuring the speed using the NHC latest version. I observe that the multiplier (which is x6 on battery mode) drops down to x2 on adaptive mode (which is called dynamic switching on NHC).
     
    avicenne13, Feb 23, 2006
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  7. wpuk

    wpuk Notebook Geek

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    Try installing the bios again something might have gone wrong on the last update you did
     
    wpuk, Feb 23, 2006
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  8. Bomfunk

    Bomfunk Notebook Consultant

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    Very weird, maybe you should ask Sony about this. I've started using NHC dynamic switching as it gives much more flexibility concerning when and to what speeds the notebook should switch.
     
    Bomfunk, Feb 24, 2006
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