By Manolis Tzanidakis Most modern laptops use Advanced Configuration & Power Interface (ACPI) for power management, so we'll focus on that. Since ACPI support for Linux (ACPI4Linux) is in constant development, you'll need a recent kernel (2.6.15 or later) in order to utilize all the latest advancements. Suspend ACPI state S3 -- also know as Suspend-to-RAM -- is the state where everything in the sy