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An Update On The Linux Power Situation In Ubuntu

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  • An Update On The Linux Power Situation In Ubuntu

    Phoronix: An Update On The Linux Power Situation In Ubuntu

    While I was away for three weeks, there was an update on LP bug #760131, the infamous bug report on the power consumption being raised significantly higher in Ubuntu Natty. This bug report of high importance now indicates a fix being committed to Natty and a fix being released for Oneiric, but what has changed? Here is an update.

    http://www.phoronix.com/vr.php?view=16496

  • #2

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    • #3
      apart from the ASPM stuff are there other regressions related to power management in Linux???

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      • #4
        Is that bug only related to Intel Hardware?

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        • #5
          ASPM affects anything with pci-e.

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          • #6
            Instructions?

            How does one set pcie_aspm=force on linux? Which config file do I have to edit and/or commands I need to run?
            Help would be greatly appreciated.

            GJ

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            • #7
              Originally posted by mcgreg View Post
              Is that bug only related to Intel Hardware?
              Originally posted by curaga View Post
              ASPM affects anything with pci-e.
              And given that any modern AMD or Intel motherboard is going to have a pci-e slot, this affects pretty much every hardware configuration out there, right?

              So every netbook, laptop, and desktop out there is hit by this bug?

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              • #8
                Originally posted by superppl View Post
                And given that any modern AMD or Intel motherboard is going to have a pci-e slot, this affects pretty much every hardware configuration out there, right?

                So every netbook, laptop, and desktop out there is hit by this bug?
                It depends more on the particular BIOS implementation. The standard is that ASPM capabilities are supposed to be declared in the various power management tables. However Windows interacts with the ASPM stuff by a different mechanism so there are a lot of BIOS's that don't bother implementing the standard. Linux works when the ASPM is declared via the standard method, but won't set the ASPM in the same manner that windows sets it (yet).

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                • #9
                  Originally posted by superppl View Post
                  And given that any modern AMD or Intel motherboard is going to have a pci-e slot, this affects pretty much every hardware configuration out there, right?

                  So every netbook, laptop, and desktop out there is hit by this bug?
                  No, this is a BIOS bug. So it depends on what motherboard you are using.

                  I don't think I've heard of any AMD motherboards having the problem, but that may just be because they aren't used by as many people.

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                  • #10
                    Power Regression for Fedora? Ubuntu Vs Fedora for this Issue?

                    I wonder how Fedora is approaching this issue?
                    How do their stats compare?
                    Does anyone know?

                    Matt

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