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Surprising Power Consumption Of Ubuntu 11.04 vs. Windows 7

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  • #16
    Originally posted by droidhacker View Post
    How is this surprising?
    Because of this Tom's Hardware article where Ubuntu 11.04 has 40% less battery life than 11.10 (and windows too).

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    • #17
      Originally posted by krazy View Post
      So the conclusion could be that Windows and Linux are both affected by the BIOS bug.

      Or, it could be that none of the systems have a buggy BIOS.

      TFA misses the most interesting point.
      Tom's hardware should write some clarification about Ubuntu's power usage now.

      http://linux.slashdot.org/story/11/0...nd-Performance

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      • #18
        Yes, it would certainly be interesting to see the results using the workaround as well as with an older Ubuntu release. But yes, it is rather surprising that they are so close in terms of power consumption. Also interesting that Catalyst performed nearly the same or better on Linux here, although this is a single case. Having a very similar system to the last one (Phenom II), it's rather relevant to me.

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        • #19
          Originally posted by down1 View Post
          Well that needs to be framed somewhere
          Not really, if you look way back, I remember when Phoronix was pointing out that Linux was faster than Windows Vista with the Catalyst driver.

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          • #20
            Would be interesting to see this comparison for an Atom. My very unprofessional personal experience with an Inspiron 1018 (Atom N455) is:

            Ubuntu 11.04: 8.5 W idling
            Windows 7 home premium: 5.5 W idling

            So in my case it seems as if Windows is a lot more power efficient. And I run Ubuntu already with the "pcie_aspm=force" kernel option.

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            • #21
              Originally posted by nicolasbock View Post
              Would be interesting to see this comparison for an Atom. My very unprofessional personal experience with an Inspiron 1018 (Atom N455) is:

              Ubuntu 11.04: 8.5 W idling
              Windows 7 home premium: 5.5 W idling

              So in my case it seems as if Windows is a lot more power efficient. And I run Ubuntu already with the "pcie_aspm=force" kernel option.
              It would be hard to give a true "apples to apples" comparison using a intel Igp as you are forced to use the foss video drivers in Linux.

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              • #22
                Originally posted by deanjo View Post
                It would be hard to give a true "apples to apples" comparison using a intel Igp as you are forced to use the foss video drivers in Linux.
                Good point. How would one measure power consumption without the graphics driver, i.e. is it possible to "remove" the effects of the graphics driver from the measurement or measure with the graphics turned off? I would imagine that I could remotely log into ubuntu and force DPMS to turn the graphics card off, and then query the battery through the command line, but I have no idea how I would do the same in windows.

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                • #23
                  Hello,

                  when reading the hader of the article it looks like a hoax because there are no major differences in power consumption but in hardware support.
                  The tests have been done very unprofessional without any os optimizations (e.g. simple kernel tuning, basic power settings) which would bring up better results.
                  Looking at timeline all tests show same time line for boot which is for me on every system I use 1:3 linux : windows.

                  My experience in power consumption on Ubuntu 11.04 is that except of missing hardware support for e.g. hybrid platform (intel/nvidia) the power consumption is almost the same without any big differences. In case of hybrid platform this varies in Windows 7 having 5 hours standby while Ubuntu 11.04 has only 3 hours because the power saving function of hybrid platform can not be used and nvidia graphics is always switched on. Strange how hardware vendors advertise supporting Ubuntu with official enhancements like Dell does but not publihing any official drivers to the public. If developement would go that way like was done with Ati cards with faster linux drivers the results would look more different.

                  Regards

                  Flip

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