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UNIX for Dummies Questions & Answers
Sleep less than 1 second
Post 81826 by jim mcnamara on Wednesday 24th of August 2005 11:44:42 AM
08-24-2005
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LEARN ABOUT CENTOS
systemd-sleep.conf
SYSTEMD-SLEEP.CONF(5) systemd-sleep.conf SYSTEMD-SLEEP.CONF(5) NAME
systemd-sleep.conf - Suspend and hibernation configuration file SYNOPSIS
/etc/systemd/sleep.conf DESCRIPTION
systemd supports three general power-saving modes: suspend a low-power state where execution of the OS is paused, and complete power loss might result in lost data, and which is fast to enter and exit. This corresponds to suspend, standby, or freeze states as understood by the kernel. hibernate a low-power state where execution of the OS is paused, and complete power loss does not result in lost data, and which might be slow to enter and exit. This corresponds to the hibernation as understood by the kernel. hybrid-sleep a low-power state where execution of the OS is paused, which might be slow to enter, and on complete power loss does not result in lost data but might be slower to exit in that case. This mode is called suspend-to-both by the kernel. Settings in this file determine what strings will be written to /sys/power/disk and /sys/power/state by systemd-sleep(8) when systemd(1) attempts to suspend or hibernate the machine. OPTIONS
The following options can be configured in the "[Sleep]" section of /etc/systemd/sleep.conf: SuspendMode=, HibernateMode=, HybridSleepMode= The string to be written to /sys/power/disk by, respectively, systemd-suspend.service(8), systemd-hibernate.service(8), or systemd- hybrid-sleep.service(8). More than one value can be specified by seperating multiple values with commas. They will be tried in turn, until one is written without error. If neither suceeds, the operation will be aborted. SuspendState=, HibernateState=, HybridSleepState= The string to be written to /sys/power/state by, respectively, systemd-suspend.service(8), systemd-hibernate.service(8), or systemd- hybrid-sleep.service(8). More than one value can be specified by seperating multiple values with commas. They will be tried in turn, until one is written without error. If neither suceeds, the operation will be aborted. EXAMPLE
: FREEZE Example: to exploit the "freeze" mode added in Linux 3.9, one can use systemctl suspend with [Sleep] SuspendState=freeze SEE ALSO
systemd-sleep(8), systemd-suspend.service(8), systemd-hibernate.service(8), systemd-hybrid-sleep.service(8), systemd(1), systemd.directives(7) systemd 208 SYSTEMD-SLEEP.CONF(5)