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    T400 Windows 7 64bit - Anyone gotten switchable graphics to work reliably? And if, how!

    Discussion in 'Lenovo' started by grkn, Oct 28, 2010.

  1. grkn

    grkn Notebook Consultant

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    This has been a major PITA for me some time, and before I waste any more energy trying to fix switchable graphics - i.e. being able to switch between discrete and integrated graphics in windows - I just want to know if it's at all possible.

    Cheers!
     
    grkn, Oct 28, 2010
    #1
  2. pk_volt

    pk_volt Notebook Consultant

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    Lenovo currently does not provide switchable graphics drivers for Windows 7, and it has been a long going process on the Lenovo driver development team to release it.
     
    pk_volt, Oct 28, 2010
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  3. JabbaJabba

    JabbaJabba ThinkPad Facilitator

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    That is not quite correct. Switchable graphics does work in Windows 7. You switch via Power Manager (and make sure it is enabled in BIOS). It works fine on my T500 with Win 7 x64.

    There are supposedly some bugs i.e. when coming out of standby. Choosing hibernate instead seems to work fine.

    Lenovo is still working on releasing bug free drivers. They were planning to release them some time ago, but it seems they are still facing some challenges.
     
    JabbaJabba, Oct 28, 2010
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  4. vimvq1987

    vimvq1987 Notebook Consultant

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    I'm using W7 x64 and I easily get switchable graphics to work. Just use System Update to install all needed drivers. Well, switchable graphics on W7 has a flaw (resume problem), but it does work

    it's just wrong!!!

    Lenovo Support & downloads - ThinkPad Switchable Graphics Driver for Windows 7 - ThinkPad R400, T400, T500, W500

    have you ever searched about it?
     
    vimvq1987, Oct 28, 2010
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  5. MidnightSun

    MidnightSun Emodicon

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    See this thread! Switchable graphics runs very reliably for me on my T500 with that driver fix, although I do have the problem where I can't adjust display brightness on discrete graphics, but that's not a big issue for me.
     
    MidnightSun, Oct 28, 2010
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  6. BinkNR

    BinkNR Knock off all that evil

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    It’s a shame Lenovo has so blatantly dropped the ball here. Then again, the way they switch drivers with this hardware amounts to little more than a Windows hack—so this is not surprising…
     
    BinkNR, Oct 28, 2010
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  7. cereal killer

    cereal killer Notebook Consultant

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    Ditto here with the exception that I have a w500. It works quite well.
     
    cereal killer, Oct 29, 2010
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  8. grkn

    grkn Notebook Consultant

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    T500 ain't the T400 :p Perhaps reformat and system update could work.. blergh
     
    grkn, Oct 29, 2010
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  9. Aiwi

    Aiwi Notebook Enthusiast

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    Using the T400 and W7 x64, only issue is being unable to change brightness on discrete graphics.

    Use system update and it'll work
     
    Aiwi, Oct 29, 2010
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  10. JabbaJabba

    JabbaJabba ThinkPad Facilitator

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    When you experience the inability to change brightness, try this:

    Switch to integrated and then back to discrete again. This works for me. I have only encountered the issue after resume from hibernate, but again it is easily fixed with the switching.
     
    JabbaJabba, Oct 29, 2010
    #10