Man Linux: Main Page and Category List


       pm-action - Suspend or Hibernate your computer


       pm-hibernate [--help]

       pm-suspend [--quirk-*] [--help]

       pm-suspend-hybrid [--quirk-*] [--help]


       This manual page documents briefly the pm-action, pm-hibernate,
       pm-suspend and pm-suspend-hybrid commands. This manual page was
       originally written for the Debian(TM) distribution and has been adopted
       by the pm-utils project.

       These commands can be used to put the machine in a sleep state. The
       precise way how this is done can be influenced by installing
       executables and configuration snippets. For some options external
       programs are needed.

       These commands will usually be called by UPower or hald when triggered
       to do so by a program in a desktop session such as gnome-power-manager.
       Calling them from the command line is also possible, but it is not
       guaranteed that all programs in your desktop session keep working as

           During suspend most devices are shutdown, and system state is saved
           in RAM. The system still requires power in this state. Most modern
           systems require 3 to 5 seconds to enter and leave suspend, and most
           laptops can stay in suspend mode for 1 to 3 days before exhausting
           their battery.

           During hibernate the system is fully powered off, and system state
           is saved to disk. The system does not require power, and can stay
           in hibernate mode indefinitely. Most modern systems require 15 to
           45 seconds to enter and leave hibernate, and entering and leaving
           hibernate takes longer when you have more memory.

           Hybrid-suspend is the process where the system does everything it
           needs to hibernate, but suspends instead of shutting down. This
           means that your computer can wake up quicker than for normal
           hibernation if you do not run out of power, and you can resume even
           if you run out of power. s2both(8) is an hybrid-suspend


       On some hardware putting the video card in the suspend state and
       recovering from it needs some special quirk handling. With the
       --quirk-* options of the pm-suspend and pm-suspend-hybrid commands you
       can select which quirks should be used.

       If pm-suspend, pm-hibernate, or pm-suspend-hybrid are invoked without
       any commandline parameters, they will try to grab the correct quirks
       from the internal quirk database.

           This option forces the video hardware to turn on the screen during
           resume. Most video adapters turn on the screen themselves, but if
           you get a blank screen on resume that can be turned back on by
           moving the mouse or typing then this option may be useful.

           This option forces the video hardware to turn off the screen when
           suspending. Most video adapters seem to do this correctly, but some
           do not, which wastes lots of power. If your screen is still on
           after successfully suspending you may need to use this option.

           This option forces Radeon hardware to turn off the display during
           suspend and turn it back on during resume. You only need to do this
           on some old ThinkPads of the '30 series (T30, X31, R32,... ) with
           Radeon video hardware.

           This option calls the video BIOS during S3 resume. Unfortunately,
           it is not always allowed to call the video BIOS at this point, so
           sometimes adding this option can actually break resume on some

           This option initializes the video card into a VGA text mode, and
           then uses the BIOS to set the video mode. On some systems S3 BIOS
           only initializes the video BIOS to text mode, and so both S3 BIOS
           and S3 MODE are needed.

           This option will attempt to reinitialize the video card when
           resuming from suspend, using the same code the system BIOS uses at
           boot in order to initialize the video hardware. Not all video cards
           need this, and using this option on systems where it is not needed
           can cause a system to lock up when resuming.

           This option will save and restore the current VESA mode which may
           be necessary to avoid X screen corruption. Using this feature on
           Intel graphics hardware is probably a bad idea.

           This option saves and restores some low level hardware state which
           may be invalid after suspend.

           This option will try to force the video card into a standard text
           mode on resume.

           Save the PCI config space for the VGA card.

           Save the quirks the video adaptor required by pm-suspend or
           pm-suspend-hybrid as an .quirkdb file that is specific to this
           system. The file will be saved in
           /var/cache/pm-utils/last_known_working.quirkdb. This parameter will
           only save the actual quirks that were used to successfully
           suspend/resume a system, and will be specific to the exact
           configuration of that system, including the video hardware, video
           driver, and whether or not kernel modesetting was used. If the
           system configuration changes, like after a kernel upgrade, this
           file will be overwritten.


           The files in this directory are evaluated in C sort order. These
           files can be provided by individual packages outside of pm-utils.
           If a global configuration variable is set, the value set to will be
           appended to the previous value. If any other variable is set, it
           will be ignored. The syntax is simply: VAR_NAME=value. See the
           CONFIGURATION VARIABLES section for valid variables defined by
           pm-utils. External packages can define others, see their respective
           documentation for more information.

       /etc/pm/sleep.d, /usr/lib/pm-utils/sleep.d
           Programs in these directories (called hooks) are combined and
           executed in C sort order before suspend and hibernate with as
           argument 'suspend' or 'hibernate'. Afterwards they are called in
           reverse order with argument 'resume' and 'thaw' respectively. If
           both directories contain a similar named file, the one in
           /etc/pm/sleep.d will get preference. It is possible to disable a
           hook in the distribution directory by putting a non-executable file
           in /etc/pm/sleep.d, or by adding it to the HOOK_BLACKLIST
           configuration variable.

           The log file shows what was done on the last suspend/hibernate and


       00 - 49
           User and most package supplied hooks. If a hook assumes that all of
           the usual services and userspace infrastructure is still running,
           it should be here.

       50 - 74
           Service handling hooks. Hooks that start or stop a service belong
           in this range. At or before 50, hooks can assume that all services
           are still enabled.

       75 - 89
           Module and non-core hardware handling. If a hook needs to
           load/unload a module, or if it needs to place non-video hardware
           that would otherwise break suspend or hibernate into a safe state,
           it belongs in this range. At or before 75, hooks can assume all
           modules are still loaded.

       90 - 99
           Reserved for critical suspend hooks.


       Configuration variables defined by pm-utils. These can be set in any
       file in /etc/pm/config.d/.

       SLEEP_MODULE [=kernel]
           The default suspend backend to use. Valid values are:

               The built-in kernel suspend/resume support. Use this if nothing
               else is supported on your system. The kernel backend is always
               used if nothing else is available.

               If your system has support for the userspace suspend programs
               (s2ram/s2disk/s2both), then use this.

               If your system has support for tuxonice/suspend2, use this.

           If video should be posted after hibernate, just like after suspend.
           You should not normally need to set this.

           Space separated list of modules to unload before suspend.

           Space separated list of hooks that should be disabled.

           Space separated list of command line parameters that should be
           added. If special quirks are needed for your system, you can add
           them here.

           Space separated list of command line parameters that should be
           ignored. If particular quirks are causing problems for your system,
           you can add them here. If you want to remove all parameters use

           Default method to power down the system when hibernating. If not
           set, the system will use the kernel default as a default value.
           Check /sys/power/disk for valid values. The default value will be
           surrounded by [square brackets].

           If your system clock drifts across a suspend/resume or
           hibernate/thaw cycle, you should set this to true. This will cause
           pm-utils to synchronize the system clock whenever going through a
           sleep/wake cycle at the expense of making suspend/resume take

       PM_HIBERNATE_DELAY [=900]
           If you are using kernel suspend/resume and invoke
           pm-suspend-hybrid, this environment variable controls how many
           seconds the system will wait after going into suspend before waking
           back up and hibernating. By default, this is set to 900 seconds (15


       Return values less than 128 mean that pm-action failed before trying to
       put the system in the requested power saving state. A return value of
       128 means that pm-action tried to put the machine in the requested
       power state but failed. A return value greater than 128 means pm-action
       encountered an error and also failed to enter the requested power
       saving state.


       Debugging suspend/resume can be a tricky process, and is covered in
       more detail in /usr/share/doc/pm-utils/README.debugging.


       The upstream BTS can be found at Select
       'pm-utils' as product.


       s2ram(8), s2disk(8), s2both(8), pm-is-supported(1), pm-powersave(8),
       vbetool(8), radeontool(8)


       Tim Dijkstra <>
           Manpage author.


       Copyright (C) 2007 Tim Dijkstra

       This manual page was originally written for the Debian(TM) system, and
       has been adopted by the pm-utils project.

       Permission is granted to copy, distribute and/or modify this document
       under the terms of the GNU General Public License, Version 2 or (at
       your option) any later version published by the Free Software