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

     apm, zzz -- control the APM BIOS and display its information

     apm [-ablstzZ] [-d	enable]	[-e enable] [-h	enable]	[-r delta]


     The apm utility controls the Intel	/ Microsoft APM	(Advanced Power	Man-
     agement) BIOS and displays	the current status of APM on laptop PCs.  The
     zzz utility suspends the system by	controlling APM.

     The following options are available for apm (no options are available for
     zzz).  If no options are specified, apm displays information and current
     status of APM in verbose mode.  If	multiple display options are given,
     the values	are displayed one per line in the order	given here.

     -a	     Display the current AC-line status	as an integer value.  The val-
	     ues 0 and 1 correspond to the "off-line" state or "on-line"
	     state, respectively.

     -b	     Display an	integer	value reflecting the current battery status.
	     The values	0, 1, 2, 3, correspond to the "high" status, "low"
	     status, "critical"	status,	"charging" status respectively.

     -d	enable
	     Disable/enable suspending of the display separately from a	normal
	     suspend using the boolean value for enable.  This feature seems
	     to	not work on many different laptops, including the Libretto
	     30CT and 50CT.

     -e	enable
	     Enable or disable APM functions of	the computer, depending	on the
	     boolean enable argument.

     -h	enable
	     Depending on the boolean value of enable, enable or disable the
	     HLT instruction in	the kernel context switch routine.  These op-
	     tions are not necessary for almost	all APM	implementations, but
	     for some implementations whose "Idle CPU" call executes both CPU
	     clock slowdown and	HLT instruction, -t is necessary to prevent
	     the system	from reducing its peak performance.  See apm(4)	for

     -l	     Display the remaining battery percentage.	If your	laptop does
	     not support this function,	255 is displayed.

     -r	delta
	     Enable the	resume wakeup timer, if	the laptop supports it.	 This
	     doesn't actually suspend the laptop, but if the laptop is sus-
	     pended, and it supports resume from suspend, then it will be re-
	     sumed after delta seconds (from when you run this command,	not
	     from when you suspend).

     -s	     Display the status	of the APM support as an integer value.	 The
	     values 0 and 1 correspond to the "disabled" state or "enabled"
	     state respectively.

     -t	     Display the estimated remaining battery lifetime in seconds.  If
	     it	is unknown, -1 is displayed.

     -Z	     Transition	the system into	standby	mode.  This mode uses less
	     power than	full power mode, but more than suspend mode.  Some
	     laptops support resuming from this	state on timer or Ring Indica-
	     tor events.  The output of	apm tells what your laptop claims to

     -z	     Suspend the system.  It is	equivalent to zzz.

     Some APM implementations do not support parameters	needed by apm.	On
     such systems, apm displays	them as	unknown.

     Some APM implementations cannot handle events such	as pushing the power
     button or closing the cover.  On such implementations, the	system must be
     suspended only by using apm or zzz.

     apmconf(8)	has been merged	in apm(8) and thus apm(8) replaces all of its


     Tatsumi Hosokawa <>

BSD			       November	1, 1994				   BSD


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