I did a clean install of Ubuntu 14.04, along dual booting Windows 7.

I love Ubuntu but then suddenly the power went out and the next thing I know my battery ran out of juice in less than 30 minutes.

Usually my battery lasts for 3 hours with Windows 7, but on Ubuntu its considerably less please give me some advice.

  • Did you have the laptop plugged into the charger when the power went out?
    – ryekayo
    Jul 14, 2014 at 16:26
  • yeah sure I had it plugged in
    – eeshankeni
    Jul 18, 2014 at 13:57
  • You probably shorted out the battery.
    – ryekayo
    Jul 18, 2014 at 14:26

4 Answers 4


Optimize your screen brightness, so it consumes less power.

Or you should also monitor your system activities by ctrl + tab and see if any process consuming lots of CPU and resources, Consuming more CPU results more heat up and less power.

Or you can install PowerTop to see what's taking the power so you can optimise your system.

To install: sudo apt-get install powertop

  • sorry to tell you man but I've already tried doing that :(
    – eeshankeni
    Jul 14, 2014 at 16:29
  • install powertop tool or you should see it ezinearticles.com/… Jul 14, 2014 at 16:35
  • could you please elaborate>>>???
    – eeshankeni
    Jul 14, 2014 at 16:35
  • 1
    Powertop is a command line tool which will show you which process consuming more power. sudo apt-get install powertop To run it sudo powertop Jul 14, 2014 at 16:38
  • 1
    @Sharmarahul I've edited your question to include the answer which you had not given in the answer but as a comment. Jul 14, 2014 at 18:50

For me tlp has worked best. Try installing it as described here. You will have to purge laptop-mode-tools package if it is installed on your system else tlp will refuse to start.


If your computer is also overheating and with the fan constantly on, it could be something to do with your graphics card and their drivers.

But for an adequate answer find out what graphics card your have (you can find out by running lspci in the terminal).

  • Could you elaborate what tweaks you did to fglrx to conserve power? Thanks.
    – user68186
    Jul 16, 2014 at 19:37
  • 2
    Welcome to Ask Ubuntu! You may wish to improve/expand on your answer. Or if you cannot you may wish to move this to a comment.
    – No Time
    Jul 16, 2014 at 19:49
  • Actually, to fix my problem I had with my radeon card (in ubutnu 13.04) I added the following code to my rc.local to disable vgaswitcharoo: chown USER /sys/kernel/debug/vgaswitcheroo/switch echo OFF > /sys/kernel/debug/vgaswitcheroo/switch modprobe radeon Jul 16, 2014 at 20:25

Try to change the user interface. Unity is heavy enough, so you have lightweight user interface choices such as XFCE (lightweight), LXDE (more lightweight), or Openbox (very lightweight). Try to install one and relogin by choosing user interface you have installed in the display manager.


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