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A Comment On The Linux 2.6.38 Power Regression

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  • #21
    Windows 7 ASPM

    Let me just point out, that Windows does indeed blacklist drivers that don't use ASPM correctly. Probably to prevent crashes.

    If you run
    Code:
    powercfg -energy
    , you get a report about the power usage of your system.

    On my PC, USB suspending and ASPM doesn't work:

    Code:
    Platform Power Management Capabilities:PCI Express Active-State Power Management (ASPM) Disabled
    PCI Express Active-State Power Management (ASPM) has been disabled due to a known incompatibility with the hardware in this computer.
    I think in my case, it's the ATI Catalyst drivers that cause ASPM to not work. I guess it could also be bios related, but my motherboard is otherwise high quality.

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    • #22
      An informative message from mjg59:
      http://lwn.net/Articles/449648/

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