Provided by: sleepd_2.04_amd64
sleepd - puts a laptop to sleep during inactivity or on low battery
sleepd [-s command] [-d command] [-u n] [-U n] [-I] [-i n] [-E] [-e filename] [-a] [-l n] [-w] [-n] [-v] [-c n] [-b n] [-A] [-H] [-N [device] [-r n] [-t n]]
sleepd is a daemon to force laptops to go to sleep after some period of inactivity. This is useful if your laptop does not automatically go to sleep when you aren't using it, and, like me, you often forget to shut it off. It is also capable of suspending a laptop when its battery gets very low. sleepd can detect activity in several ways. The default is to poll both event devices and interrupts to detect when your laptop is in use due to keyboard or mouse activity. It defaults to polling /dev/input/event*. You may specify a list of device files to poll instead, or use options to enable other means of checking for activity (network activity, utmp, or load average). After a configurable amount of time with no activity, sleepd runs a program to put the laptop to sleep.
-h, --help Show summary of options. -n, --nodaemon Don't fork to background; run in forground. -v, --verbose Output status messages. -u, --unused Number of seconds the laptop can remain idle before being put to sleep. Defaults to 600 seconds (10 minutes). Set to 0 to disable any sleeping due to idleness. -U, --ac-unused If set, controls the number of seconds the laptop can remain idle before being put to sleep when running on AC power. If not set, the laptop will not sleep when it's on AC power. -e, --event Adds an event file to the list that is watched. Using this switch disables polling all files in /dev/input/event*. -E, --no-events This switch disables event device polling. -l, --load If set, a load average higher than this number will prevent the computer from sleeping If not set, the computer will ignore the load average. -w If set, sleepd will also check idletime based on utmp. This will prevent the system from sleeping while remote connections are active. It uses the time limit from -u. -i, --irq Adds an irq to the list that is watched. Using this switch disables automatic detection of keyboard and mouse irqs unless -a is specified as well. -I, --no-irq This switch disables interrupt polling. -a, --auto Automatically detect and watch mouse and keyboard irqs. -s, --sleep-command Command to run to put the laptop to sleep. Defaults to "apm -s" for systems with APM and "pm-suspend" for systems with ACPI. -b, --battery If this option is specified, the daemon will put the laptop to sleep if the percentage of battery charge drops below the specified number and the system is off AC power. This is useful for some laptops which don't handle this themselves. It supports using APM, ACPI, and HAL for querying battery status. -d, --hibernate-command A command to run instead of the regular sleep command when the battery is low. This can be useful if you want to make the system go to sleep when it's not active, but suspend to disk if the battery is low. If not set, the sleep command is used. -N, --netdev Monitor a network interface for activity based on packet count. eth0 is the default. This option may be used more than once with different network interfaces. -t, --tx-min Set a baseline transmit raffic rate in packets per second for network monitoring. Requires -N. -r, --rx-min Set a baseline receive traffic rate in packets per second for network monitoring. Requires -N. -A, --and Only go to sleep if all specified conditions are met. For example, only sleep if idle and if the battery is low. -c, --check-period Number of seconds between check on system status. Defaults to 10 seconds, which should be fine generally. -H, --force-hal Force HAL to be used instead of ACPI or other methods to query battery status.
Interrupt monitoring cannot always detect keyboard and mouse. If the keyboard or mouse interrupt is shared (as is common with usb devices), other devices on the same interrupt can keep the system awake. Use event device polling instead.
Joey Hess <email@example.com> SLEEPD(8)