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    T400 batt. life Win7 - Switchable problem?

    Discussion in 'Lenovo' started by Gigiya, Nov 9, 2009.

  1. Gigiya

    Gigiya Notebook Guru

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    I'm running Win7 on a T400 with switchable graphics - I installed all of Lenovo's official drivers, including Power Manager and the switchable graphics driver. On "power saving", both GPUs seem to remain running as I am getting less than three hours of battery life from a 6-cell. "High performance" gets about the same, with only the ATI card seeming to run (only ATI icon in systray - on power saving, Intel and ATI both display. In Vista and XP (as of two weeks ago), I managed nearly five hours on integrated with the same settings.

    Has anyone else had the same problem with switchable graphics in Win7? I know I can change it in BIOS (as I did for running XP), but would prefer to maintain on-the-fly changing capabilities.
     
    Gigiya, Nov 9, 2009
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  2. Thaenatos

    Thaenatos Zero Cool

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    Nope I can switch fine, and I can still achieve 8-10 hours on mine. I havent checked wattage yet, but I am still getting good battery life. Have you tried removing and replacing the drivers, and/or checking to see if there is an updated version?
     
    Thaenatos, Nov 9, 2009
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  3. StealthTH

    StealthTH Notebook Evangelist

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    There is a bug where coming out of sleep it uses both GPUs. Just switch back and forth coming out of sleep to fix it.
     
    StealthTH, Nov 9, 2009
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  4. Gigiya

    Gigiya Notebook Guru

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    Running the latest driver per Lenovo's website and System Update.

    Will try sleep toggling - thanks.
     
    Gigiya, Nov 9, 2009
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