laptop-mode-tools software package provides Tools for Power Savings based on battery/AC status, you can install in your Ubuntu 14.04 LTS (Trusty Tahr) by running the commands given below on the terminal,
$ sudo apt-get update $ sudo apt-get install laptop-mode-tools
laptop-mode-tools is installed in your system.
Make ensure the laptop-mode-tools package were installed using the commands given below,
$ sudo dpkg-query -l | grep laptop-mode-tools *
You will get with laptop-mode-tools package name, version, architecture and description in a table
| Distro | Ubuntu 14 04 lts trusty tahr |
| Section | Utilities |
| Package | laptop-mode-tools |
| Version | 1.64-1ubuntu1 |
| Description | Tools for Power Savings based on battery/AC status |
| Sub Section | Utils |