laptop?mode Linux Service

laptop?mode service:

Power Management. A tool to reduce power consumption, extending the life of the laptop battery.
Now lets see the manual of laptop?mode service.
Manual laptop?mode:
Name
/usr/sbin/laptop_mode - start and stop laptop mode
Synopsis
/usr/sbin/laptop_mode [ cmd ] [ force ]
Description
This manual page documents briefly the /usr/sbin/laptop_mode command. /usr/sbin/laptop_mode is a program that enables and disables laptop mode. Laptop mode is a feature included in Linux kernels with versions 2.6.6 and higher, and 2.4.23 and higher. The intent of laptop mode is to increase battery life by letting your hard drive spin down. This is achieved by grouping disk write activity into "chunks" that are spaced at larger intervals than they normally would be.
Commands
Specify force as the second parameter to force laptop_mode to re-apply a state even if the computer is already in that state. These are the values that are allowed for cmd :
start
Enable laptop mode. Note: if the service /etc/init.d/laptop-mode has not been started, laptop mode will never be enabled.
stop
Disable laptop mode.
auto
Enable or disable laptop mode based on the current power state. This only works for ACPI or APM laptops. Note: if the service /etc/init.d/laptop-mode has not been started, laptop mode will never be enabled.
status
Display a status report about everything that laptop_mode affects.
See Also
laptop-mode.conf(8).
Author
This manual page was written by Bart Samwel (bart@samwel.tk) for the Debian system (but may be used by others). Permission is granted to copy, distribute and/or modify this document under the terms of the GNU General Public License, Version 2 any later version published by the Free Software Foundation.
On Debian systems, the complete text of the GNU General Public License can be found in /usr/share/common-licenses/GPL.
REFERENCED BY
lm-syslog-setup(8)