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pmset(1) [opendarwin man page]

PMSET(1)						    BSD General Commands Manual 						  PMSET(1)

NAME
pmset -- modify power management settings SYNOPSIS
pmset [-a | -b | -c] [dim minutes] [spindown minutes] [sleep minutes] [womp 1/0] [ring 1/0] [autorestart 1/0] [dps 1/0] [reduce 1/0] [powerbutton 1/0] [lidwake 1/0] [acwake 1/0] [boot] pmset -g [disk | live | cap | sched] DESCRIPTION
pmset changes and reads power management settings such as idle sleep timing, wake on administrative access, automatic restart on power loss, etc. SETTING
The -a, -b, -c flags determine whether the settings apply to battery (-b), charger (wall power) (-c), or all (-a). Use a minutes argument of 0 to set the idle time to never. pmset must be run as root. The boot argument tells power management that system bootup is complete. Loginwindow handles this on a normal Mac OS X system. GETTING
The -g flag outputs the settings currently in use (same as -g live ). -g disk will tell you the settings on disk. -g cap will tell you which power management features the machine supports. -g sched will show scheduled startup/wake and shutdown/sleep events. ARGUMENTS
dim - display dim timer (value in minutes) spindown - disk spindown timer (value in minutes) sleep - system sleep timer (value in minutes) womp - wake on ethernet magic packet (value = 0/1) ring - wake on modem ring (value = 0/1) autorestart - automatic restart on power loss (value = 0/1) dps - dynamically change processor speed based on load (value = 0/1) reduce - reduce processor speed (value = 0/1) powerbutton - sleep the machine when power button is pressed (value = 0/1) lidwake - wake the machine when the laptop lid(or clamshell) is opened (value = 0/1) acwake - wake the machine when power source (AC/battery) is changed (value = 0/1) OTHER ARGUMENTS
These arguments don't directly affect power management settings: boot - tell the kernel that system boot is complete EXAMPLES
pmset -b dim 5 pmset -a dim 10 spindown 10 sleep 30 womp 1 pmset -g live FILES
All changes made through pmset are saved in a persistent preferences file (per-system, not per-user) at /Library/Preferences/SystemConfiguration/com.apple.PowerManagement.plist pmset modifies the same file that System Preferences Energy Saver modifies. Darwin August 19, 2002 Darwin

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sys_attrs_pwrmgr(5)						File Formats Manual					       sys_attrs_pwrmgr(5)

NAME
sys_attrs_pwrmgr - pwrmgr subsystem attributes DESCRIPTION
This reference page lists and describes attributes for the Power Manager (pwrmgr) kernel subsystem. To change these attributes so that they take effect each time you boot the system, you create a stanza file with the attribute settings you want and then use the sysconfigdb com- mand to update the system configuration database with the information in this file. See the EXAMPLES section for more information about this process. Refer to the sys_attrs(5) reference page for an general introduction to the topic of kernel subsystem attributes. A value that enables (1) or disables (0) CPU slowdown after the CPU becomes idle. A value that enables (1) or disables (0) all power management functions (for CPU, disks, and graphics hardware). The number of min- utes to wait before powering down registered disks after they become idle. A value that enables (1) or disables (0) disk spindown after registered disks become idle. The number of minutes before entering DPMS off mode after display hardware has become idle. If you specify 0 for this attribute, DPMS off mode is disabled. A value that enables (1) or disables (0) Display Power Management Signaling (DPMS) modes for graphics display hardware. The number of minutes before entering DPMS standby mode after display hardware has become idle. If you specify 0 for this attribute, DPMS standby mode is disabled. The number of minutes before entering DPMS suspend mode after display hardware has become idle. If you specify 0 for this attribute, DPMS suspend mode is disabled. EXAMPLES
The following example shows a sample stanza file named power_mgr.stanza: pwrmgr: default_pwrmgr_state=1 cpu_slowdown=1 disk_spindown=1 disk_dwell_time=20 graphics_powerdown=1 graphics_standby_dwell=5 graphics_suspend_dwell=10 graphics_off_dwell=15 This file: Enables power management in general, plus all three of the power management options for idle hardware (CPU slowdown, disk spin- down, and DPMS modes for graphics displays) Specifies a wait of 20 minutes before spinning down a disk after it has become idle Specifies a wait of 5, 10, and 15 minutes before entering DPMS standby, suspend, and off modes, respectively, after graphics display hardware has become idle See stanza(4) for more information about stanza files. The following command updates the /etc/sysconfigtab database with the information in the stanza file: # sysconfigdb -a -f power_mgr.stanza pwrmgr See sysconfigdb(8) for more information about using this command to update the system configuration database. SEE ALSO
Commands: sysconfigdb(8) Files: stanza(4) Others: sys_attrs(5) System Administration sys_attrs_pwrmgr(5)
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