1 .\" LP (Laptop Package)
3 .\" Copyright (c) 1994 by Tatsumi Hosokawa <hosokawa@jp.FreeBSD.org>
5 .\" This software may be used, modified, copied, and distributed, in
6 .\" both source and binary form provided that the above copyright and
7 .\" these terms are retained. Under no circumstances is the author
8 .\" responsible for the proper functioning of this software, nor does
9 .\" the author assume any responsibility for damages incurred with its
19 .Nd control the APM BIOS and display its information
31 controls the Intel / Microsoft APM (Advanced Power Management) BIOS and
32 displays the current status of APM on laptop PCs.
34 suspends the system by controlling APM.
36 The following options are available for
38 (no options are available for
41 If no options are specified,
43 displays information and current status of APM in verbose mode.
44 If multiple display options are given, the values are displayed one
45 per line in the order given here.
46 .Bl -tag -width indent
48 Display the current AC-line status as an integer value. The values
49 0 and 1 correspond to the
55 Display an integer value reflecting the current battery status.
56 The values 0, 1, 2, 3, correspond to the
66 Disable/enable suspending of the display separately from a normal suspend
67 using the boolean value for
69 This feature seems to not work on many different laptops,
70 including the Libretto 30CT and 50CT.
72 Enable or disable APM functions of the computer,
73 depending on the boolean
77 Depending on the boolean value of
79 enable or disable the HLT instruction in the kernel context switch routine.
80 These options are not necessary for almost all APM implementations,
81 but for some implementations whose
83 call executes both CPU clock slowdown and HLT instruction,
85 is necessary to prevent the system from reducing its peak performance.
90 Display the remaining battery percentage. If your laptop does not
91 support this function, 255 is displayed.
93 Enable the resume wakeup timer, if the laptop supports it. This
94 doesn't actually suspend the laptop, but if the laptop is suspended,
95 and it supports resume from suspend, then it will be resume after
97 seconds (from when you run this command, not from when you suspend).
99 Display the status of the APM support as an integer value. The values
100 0 and 1 correspond to the
106 Display the estimated remaining battery lifetime in seconds. If
107 it is unknown, -1 is displayed.
109 Transition the system into standby mode. This mode uses less power than
110 full power mode, but more than suspend mode. Some laptops support
111 resuming from this state on timer or Ring Indicator events. The
112 output of apm tells what your laptop claims to support.
119 Some APM implementations do not support parameters needed by
123 displays them as unknown.
125 Some APM implementations cannot handle events such as pushing the
126 power button or closing the cover. On such implementations, the system
140 replaces all of its functionality.
144 .An Tatsumi Hosokawa Aq hosokawa@jp.FreeBSD.org