pm-utils-1.4.1
Introduction to Power Management Utilities
The Power Management Utilities is
a small collection of scripts to suspend and hibernate computer
that can be used to run user supplied scripts on suspend and
resume.
This package is known to build and work properly using an LFS-7.8
platform.
Package Information
Power Management Utilities Dependencies
Optional
xmlto-0.0.26 (to generate man pages)
Optional (runtime)
Hdparm-9.48, Wireless Tools-29, ethtool,
and vbetool
User Notes: http://wiki.linuxfromscratch.org/blfs/wiki/pm-utils
Kernel
Configuration
If needed, enable the following options in the kernel configuration
and recompile the kernel:
Power management and ACPI options --->
<*> Suspend to RAM and standby [CONFIG_SUSPEND]
<*> Hibernation (aka 'suspend to disk') [CONFIG_HIBERNATION]
Suspend to RAM allows the system to enter sleep states in which
main memory is powered and thus its contents are preserved. The
method cuts power to most parts of the machine aside from the RAM.
Because of the large power savings, it is advisable for laptops to
automatically enter this mode when the computer is running on
batteries and the lid is closed (or the user is inactive for some
time).
Suspend to disk (Hibernation) saves the machine's state into swap
space and completely powers off the machine. When the machine is
powered on, the state is restored. Until then, there is zero power
consumption. Suspend to RAM and hibernation are normally
appropriate for portable devices such as laptops, but can be used
on workstations. The capability is not really appropriate for
servers.
To use hibernation, the kernel parameter
resume=/dev/<swap_partition> has to be used on the kernel
command line (in grub.cfg). The swap partition should be at least
the size of the physical RAM on the system.
Installation of Power Management Utilities
Install Power Management Utilities
by running the following commands:
./configure --prefix=/usr \
--sysconfdir=/etc \
--docdir=/usr/share/doc/pm-utils-1.4.1 &&
make
This package does not come with a test suite.
Now, as the root user:
make install
If you don't have xmlto-0.0.26 installed, copy pregenerated man
pages:
install -v -m644 man/*.1 /usr/share/man/man1 &&
install -v -m644 man/*.8 /usr/share/man/man8 &&
ln -sv pm-action.8 /usr/share/man/man8/pm-suspend.8 &&
ln -sv pm-action.8 /usr/share/man/man8/pm-hibernate.8 &&
ln -sv pm-action.8 /usr/share/man/man8/pm-suspend-hybrid.8
Configuring Power Management Utilities
Suspend or resume functionality can be easily modified by
installing files into the /etc/pm/sleep.d directory. These files, known as
hooks, are run when the system is put into a sleep state or
resumed. Default hooks are located in /usr/lib/pm-utils/sleep.d, and user hooks should
be put in /etc/pm/sleep.d. See the
pm-action(8) man page for more information.
In order to use hibernation with GRUB and a swap partition, you need to add
kernel parameter resume=swap_partition (i.e.
resume=/dev/sda1) to the kernel line
in the /boot/grub/grub.cfg
configuration file.
Contents
Installed Programs:
on_ac_power, pm-hibernate,
pm-is-supported, pm-powersave, pm-suspend and
pm-suspend-hybrid
Installed Libraries:
None
Installed Directories:
/etc/pm, /usr/lib/pm-utils and
/usr/share/doc/pm-utils-1.4.1
Short Descriptions
|
on_ac_power
|
is a script that determines whether the system is running
on AC power (rather than a battery).
|
|
pm-hibernate
|
is a symlink to pm-action script that puts the computer
into hibernate mode (the system is fully powered off and
system state is saved to disk).
|
|
pm-is-supported
|
is a script that checks whether power management features
such as suspend and hibernate are supported.
|
|
pm-powersave
|
is a script that puts the computer into powersaving (low
power) mode.
|
|
pm-suspend
|
is a symlink to pm-action script that puts the computer
into suspend mode (most devices are shut down and system
state is saved in RAM).
|
|
pm-suspend-hybrid
|
is a symlink to pm-action script that puts the computer
into hybrid-suspend mode (the system does everything it
needs to hibernate, but suspends instead of shutting
down).
|
Last updated on 2015-09-20 15:38:20 -0700