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] [-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
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
Show summary of options.
Don’t fork to background; run in forground.
Output status messages.
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.
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.
Adds an event file to the list that is watched. Using this
switch disables polling all files in /dev/input/event*.
This switch disables event device polling.
If set, a load average higher than this number will prevent the
computer from sleeping If not set, the computer will ignore the
-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.
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.
This switch disables interrupt polling.
Automatically detect and watch mouse and keyboard irqs.
Command to run to put the laptop to sleep. Defaults to "apm -s"
for systems with APM and "pm-suspend" for systems with ACPI.
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.
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.
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.
Set a baseline transmit raffic rate in packets per second for
network monitoring. Requires -N.
Set a baseline receive traffic rate in packets per second for
network monitoring. Requires -N.
Only go to sleep if all specified conditions are met. For
example, only sleep if idle and if the battery is low.
Number of seconds between check on system status. Defaults to 10
seconds, which should be fine generally.
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>