APM(8)                  OpenBSD System Manager's Manual                 APM(8)

NAME
     apm - Advanced Power Management control program

SYNOPSIS
     zzz [-Sz] [-f sockname]
     apm [-AabCHLlmPSvz] [-f sockname]

DESCRIPTION
     apm communicates with the Advanced Power Management daemon, apmd(8), mak-
     ing requests of it for current power status or to place the system into a
     suspend or stand-by state.  With no flags, apm displays the current power
     management state in verbose form.

     The options are as follows:

     -A      Set apmd(8) to automatic performance adjustment mode.  In this
             mode, when CPU idle time falls below 10%, or if the AC power is
             connected and the battery is more than 15% charged, apm raises
             hw.setperf to 100.  Otherwise when CPU idle time is above 30% and
             the system is running on battery power, apm lowers hw.setperf as
             much as possible to reduce power consumption.

     -a      Display the external charger (A/C status).  0 means disconnected,
             1 means connected, 2 means backup power source, and 255 means un-
             known.

     -b      Display the battery status.  0 means high, 1 means low, 2 means
             critical, 3 means charging, 4 means absent, and 255 means un-
             known.

     -C      Set apmd(8) to cool running performance adjustment mode.  In this
             mode, when CPU idle time falls below 10%, apm raises hw.setperf
             as much as necessary.  Otherwise when CPU idle time is above 30%,
             apm lowers hw.setperf as much as possible to reduce heat, noise,
             and power consumption.

     -f sockname
             Set the name of the socket via which to contact apmd(8) to
             sockname.

     -H      Set apmd(8) to manual performance adjustment mode and hw.setperf
             to 100.

     -L      Set apmd(8) to manual performance adjustment mode and hw.setperf
             to 0.

     -l      Display the estimated battery lifetime (in percent).

     -m      Display the estimated battery lifetime (in minutes).

     -P      Display the performance adjustment mode.  0 means manual mode, 1
             means automatic mode, and 2 means cool running mode.

     -S      Put the system into stand-by (light sleep) state.

     -v      Request more verbose description of the displayed states.

     -z      Put the system into suspend (deep sleep) state.

     The zzz variant of this command is an alternative for suspending the sys-
     tem.  With no arguments, zzz places the system into suspend state.  The
     command line flags serve the same purpose as for the apm variant of this
     command.

     This command does not wait for positive confirmation that the requested
     state has been entered; to do so would mean the command does not return
     until the system resumes from its sleep state.

FILES
     /var/run/apmdev  default UNIX-domain socket for communicating with
                      apmd(8)

     The -f flag may be used to specify an alternate socket name.  The protec-
     tion modes on this socket govern which users may access the APM func-
     tions.

SEE ALSO
     apm(4), apmd(8)

     Advanced Power Management (APM) BIOS Interface Specification (revision
     1.2), Intel Corporation and Microsoft Corporation

HISTORY
     The apm command appeared in NetBSD 1.3, OpenBSD support was added in
     OpenBSD 1.2.

OpenBSD 4.7                    October 22, 2009                              2
