Man Linux: Main Page and Category List


       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
       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


       -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.




       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 <>