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  • What To Do If Still Seeing Poor Linux Battery Life

    Phoronix: What To Do If Still Seeing Poor Linux Battery Life

    Even after using the Linux 2.6.38 kernel power regression workaround for those systems affected by the ASPM (Active-State Power Management) bug that was detected by Phoronix, some Linux users still don't have their netbook/notebook battery lasting as long as they'd wish. For some, Microsoft Windows 7 is still performing better on the battery and/or Ubuntu 10.04 LTS and earlier. As I've said, there's still at least a couple more Linux power regressions and other areas for optimization that I've discovered and still haven't yet publicly documented in full, some in part due to still analyzing what's happening...

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

  • #2
    Toshiba Tecra

    Running a Toshiba tecra, core i3 370m, intel hd, 4 gb ddr3, 13 inch... lose about 1.5 hours going from win 7 to 11.04

    Comment


    • #3
      HP DV4 2080br
      Intel HD Graphics + ATI Radeon 4550

      System Information

      Hardware:
      Processor: Intel Core i5 M 430 @ 2.27GHz (4 Cores), Motherboard: HP 1409 v50.19, Chipset: Intel Core, Memory: 3584MB, Disk: 500GB Seagate ST9500420AS, Graphics: Intel Core IGP, Audio: IDT 92HD81B1X5

      Software:
      OS: Ubuntu 11.04, Kernel: 2.6.39-020639rc7-generic (x86_64), Desktop: Unity 3.8.16, Display Server: X Server 1.10.1, Display Driver: intel 2.15.0, OpenGL: 2.1 Mesa 7.10.2, Compiler: GCC 4.5.2, File-System: ext4, Screen Resolution: 1280x800

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      • #4
        It here any way to do the same workload on Win and Lin?

        My notebook last 1h (Asus N71) so i really have no way to decide how linux affects battery life. Any idea how can i use similar workload? and test power consumption and/or battery life?

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        • #5
          Battery life low on Ubuntu 11.04

          My system information:

          Phoronix Test Suite v3.0.1
          System Information

          Hardware:
          Processor: Intel Core 2 Duo T5800 @ 2.00GHz (2 Cores), Motherboard: Compal 30F8 v99.64, Chipset: Intel Mobile 4 MCH + ICH9M, Memory: 3072MB, Disk: 320GB TOSHIBA MK3252GS, Graphics: NVIDIA GeForce 9200M GS 512MB (529/400MHz), Audio: IDT 92HD71B7X

          Software:
          OS: Ubuntu 11.04, Kernel: 2.6.38-8-generic (i686), Desktop: GNOME 2.32.1, Display Server: X Server 1.10.1, Display Driver: NVIDIA 270.41.06, OpenGL: 3.3.0 NVIDIA 270.41.06, Compiler: GCC 4.5.2, File-System: ext4, Screen Resolution: 1280x800

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          • #6
            Another article blatently pointing out that Michael is more about the money than the community! If you know something about the power regressions the good thing to do would be to release that info, this is how the Linux community has always worked best.
            The sooner you release your info the sooner things get fixed!

            My laptop lasts an hour longer in 11.04 compared to Win7, so obviously these power regressions you speak of don't exist and you are just trying to sell more add space.
            Adblock plus well and truley engaged!

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            • #7
              Originally posted by danwood76 View Post
              Another article blatently pointing out that Michael is more about the money than the community! If you know something about the power regressions the good thing to do would be to release that info, this is how the Linux community has always worked best.
              The sooner you release your info the sooner things get fixed!

              My laptop lasts an hour longer in 11.04 compared to Win7, so obviously these power regressions you speak of don't exist and you are just trying to sell more add space.
              Adblock plus well and truley engaged!
              What a troll! If you knew what you are talking about, you would know that these regressions are tied with buggy BIOS. Consider yourself lucky and shut the f*ck up!

              Comment


              • #8
                Originally posted by danwood76 View Post
                Another article blatently pointing out that Michael is more about the money than the community! If you know something about the power regressions the good thing to do would be to release that info, this is how the Linux community has always worked best.
                The sooner you release your info the sooner things get fixed!

                My laptop lasts an hour longer in 11.04 compared to Win7, so obviously these power regressions you speak of don't exist and you are just trying to sell more add space.
                Adblock plus well and truley engaged!
                Suuuuure, you've got one single reference point, and that means you are certainly right and know what are bugs or not.

                Dude, seriously! You can't just run about and complain about this just because you aren't triggering a bug on your own computer. Not everyone is running the exact brand and model as you are. Ever heard about bugs that don't trigger on all platforms? Like maybe it's hardware dependent? You know, like a BIOS? Those things a kinda unique for each motherboard Instead of complaining, you should appreciate that someone is using their time to investigate these bugs.

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                • #9
                  Originally posted by danwood76 View Post
                  Another article blatently pointing out that Michael is more about the money than the community! If you know something about the power regressions the good thing to do would be to release that info, this is how the Linux community has always worked best.
                  The sooner you release your info the sooner things get fixed!

                  My laptop lasts an hour longer in 11.04 compared to Win7, so obviously these power regressions you speak of don't exist and you are just trying to sell more add space.
                  Adblock plus well and truley engaged!
                  One hour longer, sounds nice. What kind of hw?

                  Comment


                  • #10
                    I'm not trolling I was actually digging at Michaels lack of community spirit and the fact that his so called bug only actually seems to affect one of his machines! The bug affects a small minority of users if any. Just more reasons to try and pull people to his site to read the 'news'.

                    I understand buggy BIOS' as I do have one. My laptop wouldn't even boot every time powered until the most recent kernel due to an MSI bug that caused the kernel to hang (not even a panic) and my laptop is old (Toshiba L30 from 2006)!

                    All Laptop BIOS seem to be the worst, I've never had any issues with power management or the like from my desktop motherboards.

                    I think I get an hour extra because Win7 doesn't seem to do the power management properly even with all the latest drivers and so on loaded. To be honest I only use windows occasionally as it offers no advantages over Ubuntu so its never a big deal for me. I usually get 3 hours from my laptop if using Wifi and much longer if not.
                    This is in-line with my previous experience, mind you if Michael is not talking bollocks then I might even get more time from my battery!

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                    • #11
                      Just saying, my HP Pavilion dv6 went from 5 hours of battery life to barely 3 hours...

                      Comment


                      • #12
                        Originally posted by LinuxID10T View Post
                        Just saying, my HP Pavilion dv6 went from 5 hours of battery life to barely 3 hours...
                        HP Pavilion dv6-3050eo (Core i5-450M + Radeon HD 5650)

                        Power usage is consistently 6-9 W higher on Linux than on Windows. The system is affected by the kernel commit Michael posted, but ASPM does not really work: half the devices have it disabled even with pcie_aspm=force and it seems to be disabled on Win 7 too. So ASPM is probably not the issue.

                        Very inexact values measured on AC when idle on desktop and battery full:
                        17W Win 7 Intel
                        28W Win 7 AMD
                        25W Linux Intel (gpu-switcheroo)
                        37W Linux AMD (gpu-switcheroo)

                        Linux 3.0-rc5 and all others I have used.

                        So I have examined both CPU and GPU clock speeds and ASPM but they don't seem to be causing the problem. What else could use so much power?

                        Note: I have not measured power drain when on battery

                        Comment


                        • #13
                          Use powertop (properly) and see how many wakeups from what apps you get.

                          If you are on the latest Ubuntu I found that UbuntuOne (which I don't use) was causing a huge number of wakeups so that needs to be disabled. But PowerTop will reveal all.
                          Also enabling power saving modes for most hardware and laptop mode will reduce your power consumption.

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                          • #14
                            short battery Ubuntu 11.04

                            After making changes to common line of / etc / default / grub and introduce pcie_aspm = force, as recommended, the line was in this situation:

                            I GRUB_CMDLINE_LINUX_DEFAULT = "quiet splash pcie_aspm = force"
                            GRUB_CMDLINE_LINUX = "quiet"

                            After making these changes improved battery a bit but its spending in windos xp would be about 2 and a half in ubuntu does not come to a full hour

                            my notebook is: Processor: Intel Atom N280@1.33GHz (2 Cores), Motherboard: Acer Aspire One D150, Chipset: Intel Mobile 945GME MCH + ICH7-M, Memory: 2048MB, Disk: 160GB Hitachi HTS54321, Graphics: Intel Mobile 945GME IGP 256MB Audio: Realtek ALC272X

                            If this helps them I thank you, I am new to ubuntu, and not I know I could do more to help them find a solution to this porblema so serious, and I'm from Spain and their support and collaboration help me a lot
                            thank you very much

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                            • #15
                              Originally posted by danwood76 View Post
                              My laptop lasts an hour longer in 11.04 compared to Win7, so obviously these power regressions you speak of don't exist and you are just trying to sell more add space.
                              Adblock plus well and truley engaged!
                              OK dude, let me tell you this: I have a brand new Thinkpad T420 with a fancy Sandy Bridge CPU and what not. It is affected by the PCIE ASPM issue Michael discovered a week or so back. Idle power consumption (WiFi connected, screen on medium brightness) went down by 25% to an average of 7-8W. That gives me a fantastic eleven to twelve hours of use. Sice I want to keep my battery for a while, I don't charge beyond 85% (ThinkPads have that option) and avoid discharging below 30%. Thanks to Michael's discovery, I rarely get below 40%, meaning he probably bought me a nice expansion of battery lifetime. I'm happy to generate some ad revenue for that. So how about you just consider yourself lucky and keep your mouth shut?

                              But I do have to say that all these Bavaria references kinda get annoying over time.

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