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Thread: HORRIBLE 11.10 battery life - fix anytime soon?

  1. #21
    Join Date
    Jan 2006
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    152
    Distro
    Ubuntu 11.10 Oneiric Ocelot

    Re: HORRIBLE 11.10 battery life - fix anytime soon?

    Quote Originally Posted by aeronutt View Post
    FYI, this significantly decreased power draw on my i3 based laptop.

    http://ubuntuforums.org/showpost.php...78&postcount=9

    My current draw went from ~1500mA to ~800mA with the following kernel options

    change
    GRUB_CMDLINE_LINUX_DEFAULT="quiet splash"
    To
    GRUB_CMDLINE_LINUX_DEFAULT="i915.i915_enable_rc6=1 i915.i915_enable_fbc=1 i915.lvds_downclock=1"

    then sudo update-grub

    The one that made the majority (nearly all) of the difference was the first.
    Tried it on my i7. Fingers crossed!

  2. #22
    Join Date
    Jan 2006
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    152
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    Ubuntu 11.10 Oneiric Ocelot

    Re: HORRIBLE 11.10 battery life - fix anytime soon?

    Quote Originally Posted by werewolves View Post
    Tried it on my i7. Fingers crossed!
    Ugh, no help. Still mediocre, even with Jupiter installed.

  3. #23

    Re: HORRIBLE 11.10 battery life - fix anytime soon?

    Quote Originally Posted by werewolves View Post
    Ugh, no help. Still mediocre, even with Jupiter installed.
    Also add:

    pcie_aspm=force

    to your grub kernel options.
    [ Fuduntu.org ] - [ Fuduntu Forum ] - [ Fuduntu Blog ] - [ Fuduntu Wiki ]

    For a classic desktop with the latest apps, get Fuduntu!

  4. #24
    Join Date
    Nov 2011
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    11

    Re: HORRIBLE 11.10 battery life - fix anytime soon?

    pcie_aspm=force added to my grub boot menu is what netted me the largest gain. I am running an i5 with intel graphics and kernel 3.1.4. I am going to try a 3.2 kernel later on to see if there is any difference. The other options (i915.i915_enable***, etc.) provided about the same increase in battery life as powertop. Phoronix has a really good article about these and about the different kernels.

    http://www.phoronix.com/scan.php?pag...15_power&num=1

  5. #25
    Join Date
    Jan 2006
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    152
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    Ubuntu 11.10 Oneiric Ocelot

    Re: HORRIBLE 11.10 battery life - fix anytime soon?

    Quote Originally Posted by fuduntu View Post
    Also add:

    pcie_aspm=force

    to your grub kernel options.
    OK, I'll try it out.

  6. #26
    Join Date
    Oct 2005
    Location
    Syracuse, NY
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    659
    Distro
    Ubuntu 11.10 Oneiric Ocelot

    Re: HORRIBLE 11.10 battery life - fix anytime soon?

    Quote Originally Posted by werewolves View Post
    Tried it on my i7. Fingers crossed!
    You may want to try the 3.2 ubuntu kernel (It has the ASPM fix already backported into it). For Oneiric there is a PPA with 3.2 RC7 from Precise already backported for Oneiric if don't want to compile on your own. The final 3.2 kernel should be out shortly and the PPA will be updated. This is the kernel that PP will be shipping with.

    https://launchpad.net/~ptn107/+archive/ppa
    Last edited by xyzzyman; December 29th, 2011 at 07:35 AM.

  7. #27
    Join Date
    Jul 2010
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    Bangalore, India
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    147
    Distro
    Ubuntu Development Release

    Re: HORRIBLE 11.10 battery life - fix anytime soon?

    The best option is to wait for next Ubuntu release

    http://www.engadget.com/2011/12/19/u...-predecessors/
    A stopped clock shows right time twice a day

  8. #28
    Join Date
    May 2010
    Location
    Northern California
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    33
    Distro
    Ubuntu 12.04 Precise Pangolin

    Re: HORRIBLE 11.10 battery life - fix anytime soon?

    Quote Originally Posted by BC59 View Post
    There is the kernel 3.2 RC option....for the ones who dare to do it.
    I installed kernel 3.2.0-999 on my Lenovo G570 and so far I have noticed that the fan runs more quietly and that battery life appears to be much better. I have not had any crashes or compatibility issues with this kernel.
    Last edited by divergex; December 29th, 2011 at 09:01 AM.

  9. #29
    Join Date
    Dec 2011
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    12

    Re: HORRIBLE 11.10 battery life - fix anytime soon?

    hi everyone!

    I had the exact same problem as fictivetoast (though I have a dell vostro v131). I edited grub as you were suggesting, and everything seems fine, but I was wondering what kind of problems this may cause, so that I can keep an eye on them. For example, is it possible that this fix cause a slight overheating? I didn't check cpus and hdd temperatures before changing grub, but now using lm-sensors I saw the cpus stay between 47°C and 51°C and hdd around 40°C. Is it normal?
    Last edited by mattia.tamellini; December 29th, 2011 at 12:05 PM.

  10. #30
    Join Date
    Aug 2011
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    42

    Re: HORRIBLE 11.10 battery life - fix anytime soon?

    hello! i'm not a professional ubuntu user, i have a dell latitude E5420 i5. ubuntu battery life is quite lower than on windows 7. how can i add "those additional parameters to my grub conf"??

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