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CONFIG_PM: Device power management core functionality

General informations

The Linux kernel configuration item CONFIG_PM has multiple definitions:

Device power management core functionality found in kernel/power/Kconfig

The configuration item CONFIG_PM:

Help text

Enable functionality allowing I/O devices to be put into energy-saving (low power) states, for example after a specified period of inactivity (autosuspended), and woken up in response to a hardware-generated wake-up event or a driver's request.

Hardware support is generally required for this functionality to work and the bus type drivers of the buses the devices are on are responsible for the actual handling of device suspend requests and wake-up events.

Power Management support found in arch/m68k/Kconfig

The configuration item CONFIG_PM:

Help text

Support processor power management modes

found in arch/parisc/Kconfig

The configuration item CONFIG_PM:

Help text

(none)

found in kernel/power/Kconfig

The configuration item CONFIG_PM:

Help text

(none)

Power Management support found in kernel/power/Kconfig

The configuration item CONFIG_PM:

Help text

"Power Management" means that parts of your computer are shut off or put into a power conserving "sleep" mode if they are not being used. There are two competing standards for doing this: APM and ACPI. If you want to use either one, say Y here and then also to the requisite support below.

Power Management is most important for battery powered laptop computers; if you have a laptop, check out the Linux Laptop home page on the WWW at http://www.linux-on-laptops.com/ or Tuxmobil - Linux on Mobile Computers at http://www.tuxmobil.org/ and the Battery Powered Linux mini-HOWTO, available from http://www.tldp.org/docs.html#howto.

Note that, even if you say N here, Linux on the x86 architecture will issue the hlt instruction if nothing is to be done, thereby sending the processor to sleep and saving power.

Power Management support found in arch/m68knommu/Kconfig

The configuration item CONFIG_PM:

Help text

Support processor power management modes

Power Management support (EXPERIMENTAL) found in arch/mips/Kconfig

The configuration item CONFIG_PM:

Help text

(none)

Power Management support found in arch/arm/Kconfig

The configuration item CONFIG_PM:

Help text

"Power Management" means that parts of your computer are shut off or put into a power conserving "sleep" mode if they are not being used. There are two competing standards for doing this: APM and ACPI. If you want to use either one, say Y here and then also to the requisite support below.

Power Management is most important for battery powered laptop computers; if you have a laptop, check out the Linux Laptop home page on the WWW at http://www.linux-on-laptops.com/ or Tuxmobil - Linux on Mobile Computers at http://www.tuxmobil.org/ and the Battery Powered Linux mini-HOWTO, available from http://www.tldp.org/docs.html#howto.

Power Management support found in arch/ia64/Kconfig

The configuration item CONFIG_PM:

Help text

"Power Management" means that parts of your computer are shut off or put into a power conserving "sleep" mode if they are not being used. There are two competing standards for doing this: APM and ACPI. If you want to use either one, say Y here and then also to the requisite support below.

Power Management is most important for battery powered laptop computers; if you have a laptop, check out the Linux Laptop home page on the WWW at http://www.linux-on-laptops.com/ and the Battery Powered Linux mini-HOWTO, available from http://www.tldp.org/docs.html#howto.

Note that, even if you say N here, Linux on the x86 architecture will issue the hlt instruction if nothing is to be done, thereby sending the processor to sleep and saving power.

Power Management support (EXPERIMENTAL) found in arch/ppc/platforms/4xx/Kconfig

The configuration item CONFIG_PM:

Help text

(none)

found in drivers/macintosh/Kconfig

The configuration item CONFIG_PM:

Help text

(none)

found in arch/ppc/Kconfig

The configuration item CONFIG_PM:

Help text

(none)

Power Management support found in arch/x86_64/Kconfig

The configuration item CONFIG_PM:

Help text

"Power Management" means that parts of your computer are shut off or put into a power conserving "sleep" mode if they are not being used. There are two competing standards for doing this: APM and ACPI. If you want to use either one, say Y here and then also to the requisite support below.

Power Management is most important for battery powered laptop computers.

Note that, even if you say N here, Linux on the x86 architecture will issue the hlt instruction if nothing is to be done, thereby sending the processor to limited sleep and saving power. However using ACPI will likely save more power.

Power Management support (EXPERIMENTAL) found in arch/mips/Kconfig-shared

The configuration item CONFIG_PM:

Help text

(none)

Power Management support found in arch/i386/Kconfig

The configuration item CONFIG_PM:

Help text

"Power Management" means that parts of your computer are shut off or put into a power conserving "sleep" mode if they are not being used. There are two competing standards for doing this: APM and ACPI. If you want to use either one, say Y here and then also to the requisite support below.

Power Management is most important for battery powered laptop computers; if you have a laptop, check out the Linux Laptop home page on the WWW at http://www.cs.utexas.edu/users/kharker/linux-laptop/ and the Battery Powered Linux mini-HOWTO, available from http://www.tldp.org/docs.html#howto.

Note that, even if you say N here, Linux on the x86 architecture will issue the hlt instruction if nothing is to be done, thereby sending the processor to sleep and saving power.

found in arch/ia64/Kconfig

The configuration item CONFIG_PM:

Help text

"Power Management" means that parts of your computer are shut off or put into a power conserving "sleep" mode if they are not being used. There are two competing standards for doing this: APM and ACPI. If you want to use either one, say Y here and then also to the requisite support below.

Power Management is most important for battery powered laptop computers; if you have a laptop, check out the Linux Laptop home page on the WWW at http://www.cs.utexas.edu/users/kharker/linux-laptop/ and the Battery Powered Linux mini-HOWTO, available from http://www.tldp.org/docs.html#howto.

Note that, even if you say N here, Linux on the x86 architecture will issue the hlt instruction if nothing is to be done, thereby sending the processor to sleep and saving power.

Power Management support (EXPERIMENTAL) found in arch/ppc/Kconfig

The configuration item CONFIG_PM:

Help text

(none)

Hardware

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