I have installed Ubuntu 14.10 with Windows 8.1 dual boot.
I have noticed that Ubuntu gives 3hr and Windows 4hr battery timing.
Why?
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Talha Junaid
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Windows has power management settings for your cpu set. You can install a cpu governor that will allow you to set the cpu to performance, or powersave:
sudo apt-get update
sudo apt-get install indicator-cpufreq
After installation, press ALT + F2 and type the command
indicator-cpufreq
An icon will appear on your system panel. Click on this icon and make your selection.
There are a few power management tools available to help you control power consumption.
First, laptop-mode-tools:
sudo apt-get update
sudo apt-get install laptop-mode-tools
To use laptop-mode-tools, execute the following command:
gksu lmt-config-gui
Next, an alternative to laptop mode tools is TLP. If you do decide to install TLP, you must first remove laptop-mode-tools as they conflict.
Click here for more information on installing TLP.
Note: if you install TLP, I suggest using the hard drive setting "254" to minimize wear and tear to your hard drive. Also, if you want to use indicator-cpufreq, set the cpu "governor" to "performance". This eliminates scaling from TLP and allows scaling to be controlled by indicator-cpufreq. See here for more info.
here for more info on laptop-mode-tools
The following is for intel users only.
For more control over cpu freq. scaling, you can disable intel pstate. Disabling p-state will offer the options conservative, powersave, ondemand, and performance.
First, open a terminal and execute the following commands:
gksu gedit /etc/default/grub
Now, look for "GRUB_CMDLINE_LINUX_DEFAULT=" and make the line look like this:
GRUB_CMDLINE_LINUX_DEFAULT="quiet splash intel_pstate=disable"
Save the file, exit gedit, and execute the following command:
sudo update-grub
Reboot for the changes to take effect.
Click here for more info on intel_pstate.
Install thermald:
sudo apt-get install thermald
Reboot for the changes to take effect.
