NAME
apm – display power management status
SYNOPSIS
apm [-abltzZ]
DESCRIPTION
The apm utility reports power management status.
The options are as follows:
- -a
-
Display the current AC-line status as an integer value. The values 0, 1 and 2 correspond to the “off-line” state, “on-line” state or “backup power” 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.
- -l
-
Display the remaining battery percentage. If your laptop does not support this function, 255 is displayed.
- -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.
- -z
-
Suspend the system.
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.
SEE ALSO
HISTORY
The apm utility originally controlled the Advanced Power Management (APM) BIOS extension on i386, now it interfaces with ACPI.
AUTHORS
Tatsumi Hosokawa ⟨[email protected]⟩