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An [Acronym] for __A__dvanced __C__onfiguration and __P__ower __I__nterface. The newer method for changing devices' power status (eg on standby, hibernating, etc). The older method was [APM] (Advanced Power Management). 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.
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ACPI
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APM
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