laptop-mode-tools 1.11-1ubuntu2 (amd64 binary) in ubuntu dapper

 Laptop mode is a Linux kernel feature that allows your
 laptop to save considerable power, by allowing the hard
 drive to spin down for longer periods of time. This package
 contains the userland scripts that are needed to enable
 laptop mode. It includes support for automatically enabling
 laptop mode when the computer is working on batteries.