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An [Acronym] for __A__dvanced __C__onfiguration and __P__ower __I__nterface. The newer interface for changing devices' power status (eg on standby, hibernating, etc); supersedes [APM]. Some example uses: * spinning down idle hard drives, * telling a monitor to go into lower power mode (but different from [DPMS] for going into standby) * making a machine go into standby or complete hibernation Many newer laptops use [ACPI] exclusively without support for [APM]. Linux kernel 2.4.x had some support for [ACPI], but kernel 2.6 should have much better support. There is all kinds of interesting information inside ''/proc/acpi'' For example: Is my Laptop Lid open? : ''cat /proc/acpi/button/lid/LID/state'' The State of your laptops battery : ''cat /proc/acpi/battery/BAT1/state'' !acpi command This can tell you how much charge is left in your laptop battery and how long until it is depleted. Example Output: * Battery 1: discharging, 96%, 02:34:16 remaining See also: the [ACPI specification | http://www.acpi.info/]
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