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Thread: Laptop Power Management?

  1. #1
    Join Date
    Oct 2011
    Ubuntu 12.04 Precise Pangolin

    Question Laptop Power Management?

    Hey guys, I've largely restricted using Ubuntu to my desktop as it is my main PC, but now I have installed it on my laptop as well for use when I am not at home. I plan to use my laptop exclusvely in the future so wanna get it all setup. Basically, it will be docked 50% running on full AC power and at full performance, but the other 50% of the time I will be traveling with it so battery life is important to me. I did a stock install of Ubuntu 12.04 LTS (x64) and basically, what tips/tricks/applications do you guys recommend to optimize battery life? Juniper is appearently dead(?) so I shouldn't use it and Ubuntu does have some built in power management options but I don't know effective they are at extending battery life...

    Laptop specs = Intel Core i5, 8GB DDR3, 128GB SSD, Intel 4000 HD graphics, etc. Canadian Web Design and Hosting

  2. #2
    Join Date
    Jun 2009

    Re: Laptop Power Management?

    you can change the cpu governor in /etc/init.d/ondemand

    i am running 13.04 so my file is different than yours, if you don't know what you need to edit post the content and i can mark where you can edit it
    you want to change "ondemand" to "conservative"
    i change the line that says 'sleep 60' to 'sleep 30' so it does its thing faster

    i hope you made the appropriate config options for your ssd

    you can also set your brightness below the min setting, i can do this on my laptop
    echo 160 | sudo tee /sys/class/backlight/intel_backlight/brightness
    i use my /etc/lightdm/lightdm.conf file to restore the brightness setting on boot using xbacklight
    greeter-setup-script = xbacklight -set 0
    i have mine setup a bit more fancy so it saves the brightness at logout and then restores it at boot
    that does not restore the below 0 value btw

    be sure your screensaver is set to blackscreen and turns the screen off
    Last edited by pqwoerituytrueiwoq; April 17th, 2013 at 12:17 AM.
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  3. #3
    Join Date
    Jan 2008
    Brooklyn, NY
    Ubuntu Development Release

    Re: Laptop Power Management?

    I have Powertop on my Dell. It's in the repositories.

    Also, I have Jupiter. There is a ppa for it at
    A common mistake that people make when trying to design something completely foolproof is to underestimate the ingenuity of complete fools.

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