Messages in this thread | | | Date | Thu, 26 Jun 2008 15:40:19 -0400 (EDT) | From | Len Brown <> | Subject | Re: [PATCH 4/4] Remove obsolete piece of PM documentation |
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> > > > > - Linux Power Management Support > > > > > - > > > > > -This document briefly describes how to use power management with your > > > > > -Linux system and how to add power management support to Linux drivers. > > > > > - > > > > > -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.. > > > > > > > > I'd keep this; it is still true, and we still support both. > > > > > > > > Maybe it should be moved into Doc*/power/apm.txt or something. > > > > > > Yes, if there is a good sub-directory for it, please put it there.
I think this is already covered in the Kconfig help for ACPI and APM and doesn't need a Documentation file.
-Len
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