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-APM or ACPI?
-If you have a relatively recent x86 mobile, desktop, or server system,
-odds are it supports either Advanced Power Management (APM) or
-Advanced Configuration and Power Interface (ACPI). ACPI is the newer
-of the two technologies and puts power management in the hands of the
-operating system, allowing for more intelligent power management than
-is possible with BIOS controlled APM.
-The best way to determine which, if either, your system supports is to
-build a kernel with both ACPI and APM enabled (as of 2.3.x ACPI is
-enabled by default). If a working ACPI implementation is found, the
-ACPI driver will override and disable APM, otherwise the APM driver
-will be used.
-No, sorry, you cannot have both ACPI and APM enabled and running at
-once. Some people with broken ACPI or broken APM implementations
-would like to use both to get a full set of working features, but you
-simply cannot mix and match the two. Only one power management
-interface can be in control of the machine at once. Think about it..
-Both APM and ACPI rely on user-space daemons, apmd and acpid
-respectively, to be completely functional. Obtain both of these
-daemons from your Linux distribution or from the Internet (see below)
-and be sure that they are started sometime in the system boot process.
-Go ahead and start both. If ACPI or APM is not available on your
-system the associated daemon will exit gracefully.
- apmd: http://ftp.debian.org/pool/main/a/apmd/
- acpid: http://acpid.sf.net/