%general-entities; ]> $LastChangedBy$ $Date$ pm-utils 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. &lfs81_checked; Package Information Download (HTTP): Download (FTP): Download MD5 sum: &pm-utils-md5sum; Download size: &pm-utils-size; Estimated disk space required: &pm-utils-buildsize; Estimated build time: &pm-utils-time; Power Management Utilities Dependencies Optional (to generate man pages) Optional (runtime) , , ethtool, and vbetool User Notes: 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. pm-utils Install Power Management Utilities by running the following commands: ./configure --prefix=/usr \ --sysconfdir=/etc \ --docdir=/usr/share/doc/pm-utils-&pm-utils-version; && make This package does not come with a test suite. Now, as the root user: make install If you don't have 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 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. Installed Programs Installed Libraries Installed Directories on_ac_power, pm-hibernate, pm-is-supported, pm-powersave, pm-suspend and pm-suspend-hybrid None /etc/pm, /usr/lib/pm-utils and /usr/share/doc/pm-utils-&pm-utils-version; Short Descriptions on_ac_power is a script that determines whether the system is running on AC power (rather than a battery). on_ac_power 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-hibernate pm-is-supported is a script that checks whether power management features such as suspend and hibernate are supported. pm-is-supported pm-powersave is a script that puts the computer into powersaving (low power) mode. pm-powersave 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 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). pm-suspend-hybrid