101 lines
3.6 KiB
Plaintext
101 lines
3.6 KiB
Plaintext
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 <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.
|
|
|
|
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 <time>'
|
|
(patch for sysvinit needed).
|
|
|
|
It creates an image which is saved in your active swap. Upon next
|
|
boot, pass the 'resume=/dev/swappartition' argument to the kernel to
|
|
have it detect the saved image, restore memory state from it, and
|
|
continue to run as before. If you do not want the previous state to
|
|
be reloaded, then use the 'noresume' kernel argument. However, note
|
|
that your partitions will be fsck'd and you must re-mkswap your swap
|
|
partitions. It does not work with swap files.
|
|
|
|
Right now you may boot without resuming and then later resume but
|
|
in meantime you cannot use those swap partitions/files which were
|
|
involved in suspending. Also in this case there is a risk that buffers
|
|
on disk won't match with saved ones.
|
|
|
|
For more information take a look at <file:Documentation/power/swsusp.txt>.
|
|
|
|
config PM_STD_PARTITION
|
|
string "Default resume partition"
|
|
depends on SOFTWARE_SUSPEND
|
|
default ""
|
|
---help---
|
|
The default resume partition is the partition that the suspend-
|
|
to-disk implementation will look for a suspended disk image.
|
|
|
|
The partition specified here will be different for almost every user.
|
|
It should be a valid swap partition (at least for now) that is turned
|
|
on before suspending.
|
|
|
|
The partition specified can be overridden by specifying:
|
|
|
|
resume=/dev/<other device>
|
|
|
|
which will set the resume partition to the device specified.
|
|
|
|
Note there is currently not a way to specify which device to save the
|
|
suspended image to. It will simply pick the first available swap
|
|
device.
|
|
|
|
config SWSUSP_ENCRYPT
|
|
bool "Encrypt suspend image"
|
|
depends on SOFTWARE_SUSPEND && CRYPTO=y && (CRYPTO_AES=y || CRYPTO_AES_586=y || CRYPTO_AES_X86_64=y)
|
|
default ""
|
|
---help---
|
|
To prevent data gathering from swap after resume you can encrypt
|
|
the suspend image with a temporary key that is deleted on
|
|
resume.
|
|
|
|
Note that the temporary key is stored unencrypted on disk while the
|
|
system is suspended.
|
|
|
|
config SUSPEND_SMP
|
|
bool
|
|
depends on HOTPLUG_CPU && X86 && PM
|
|
default y
|