config PM bool "Power Management support" depends on !IA64_HP_SIM ---help--- "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 or Tuxmobil - Linux on Mobile Computers at and the Battery Powered Linux mini-HOWTO, available from . 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. config PM_LEGACY bool "Legacy Power Management API" depends on PM default y ---help--- Support for pm_register() and friends. If unsure, say Y. config PM_DEBUG bool "Power Management Debug Support" depends on PM ---help--- This option enables verbose debugging support in the Power Management code. This is helpful when debugging and reporting various PM bugs, like suspend support. config SOFTWARE_SUSPEND bool "Software Suspend" depends on PM && SWAP && (X86 && (!SMP || SUSPEND_SMP)) || ((FVR || PPC32) && !SMP) ---help--- Enable the possibility of suspending the machine. It doesn't need APM. You may suspend your machine by 'swsusp' or 'shutdown -z