"Part of proper power management is the ability to put your
laptop to sleep. ACPI sleep is defined as a state where the system
is still technically powered on, but the screen and hard disk are
powered down and the computer is using just enough power to keep
the contents of RAM alive. The Ubuntu development team has devoted
an immense amount of effort toward getting ACPI power management
working properly. As it stands, Ubuntu is power-management-friendly
right out of the box, thanks to the recent addition of the
gnome-power-manager package. It turns out there's not much required
to get most modern laptops to sleep and wake up correctly.
"The Dapper Drake release of Ubuntu Linux includes the new
gnome-power-manager package, which enables ACPI sleep much like the
system-tray power applet in Windows. Finally, sleep 'just works' in
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