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