Power management

This articles describes methods to save energy for a longer battery runtime, for a more quiet computer, for lower power cost and for conserve the environment.

BIOS
Disable unused devices right in the BIOS, e.g.:
 * Serial ports
 * Parallel ports
 * Ethernet network devices
 * Bluetooth controllers

Devices
Devices, which can save energy during runtime:
 * Processor
 * Display
 * HDD
 * CDROM
 * Graphics Adapters
 * Ethernet
 * Wifi
 * Bluetooth
 * Soundcard
 * Bus
 * Hibernation