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Thread: PowerXpress Runtime Power Management Added

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  1. #1
    Join Date
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    Default PowerXpress Runtime Power Management Added

    Phoronix: PowerXpress Runtime Power Management Added

    Open-source developers are adding run-time power management support to the open-source Radeon DRM graphics driver for supporting ATI/AMD PowerXpress laptops...

    http://www.phoronix.com/vr.php?view=MTQ2NjI

  2. #2
    Join Date
    Aug 2012
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    Tears in my face..
    DRI_PRIME + RADEON = CHECK
    POWER MANAGEMENT = CHECK

    Now my amd 6850m DGPU just need to be useful under linux... Because don't be useful already = check

  3. #3
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    Aug 2012
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    what can PXP users expect from this? better battery life on their laptops? any increase in performance?

  4. #4
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    The dGPU will get powered down automatically when it's not in use. So it should save some power if you weren't manually powering up/down the dGPU before. Perfornance shouldn't be affected.

  5. #5
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    Quote Originally Posted by agd5f View Post
    The dGPU will get powered down automatically when it's not in use. So it should save some power if you weren't manually powering up/down the dGPU before. Perfornance shouldn't be affected.
    Hey Alex 2 questions for ya.

    How is PowerXPress / Optimus handled in Windows? Is it a window hint or does the driver just decide based on load of the integrated which to use? Or something else? (And can we use the same idea on Linux?)

    I know you're more kernel side.. but do you have any idea how letting X load multiple GPU drivers is coming along?

  6. #6
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    Quote Originally Posted by Ericg View Post
    Hey Alex 2 questions for ya.

    How is PowerXPress / Optimus handled in Windows? Is it a window hint or does the driver just decide based on load of the integrated which to use? Or something else? (And can we use the same idea on Linux?)

    I know you're more kernel side.. but do you have any idea how letting X load multiple GPU drivers is coming along?
    AFAIK, it works similarly on windows (i.e., user can select which GPU to use for a specific app, although there may be some default profiles for more common apps). X handles multiple GPUs in PX-like configurations just fine starting with xserver 1.14 or newer. See this page for how to use the GPUs in PX/Optimus laptops with X:
    http://nouveau.freedesktop.org/wiki/Optimus/

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