NAME
asmc — device driver for the Apple System Management Controller (SMC)SYNOPSIS
To compile this driver into the kernel, place the following line in your kernel configuration file:device
asmc
Alternatively, to load the driver as a module at boot time, place the following
line in loader.conf(5):
asmc_load="YES"
DESCRIPTION
The asmc driver controls the Apple System Management Controller (SMC for short) found on Intel Apple systems. The SMC is known to be found on the following systems:- MacBook
- MacBook Pro
- Intel MacMini
- Mac Pro
- MacBook Air
- Intel iMac
KEYBOARD BACKLIGHT
On MacBook Pro systems, you can control the keyboard brightness by writing a value to the dev.asmc.%d.light.control sysctl MIB. The following sysctl MIBs contains the raw value returned by the left and right light sensors: dev.asmc.%d.light.left or dev.asmc.%d.light.right.TEMPERATURES
The number of temperature sensors and their description varies among systems. You can inspect the temperature sensors on your system by traversing the dev.asmc.temp sysctl MIB. All values are in degrees celsius.SYSTEM FANS
The dev.asmc.fan.%d sysctl tree contains the leaf nodes speed, safespeed, minspeed, maxspeed and targetspeed. Each of these leaf nodes represent the current fan speed, the safest minimum fan speed, the minimum speed and the maximum speed respectively. All values are in RPM.SUDDEN MOTION SENSOR
The Sudden Motion Sensor (SMS for short) is a device that detects laptop movement and notifies the operating system via an interrupt. The sysctl MIBs present under dev.asmc.sms all relate to the SMS. The most interesting usage of this device is to park the disk heads when the laptop is moved harshly. First, you need to install ataidle(8) (ports/sysutils/ataidle) and then configure devd(8) the following way:
notify 0 {
match "system" "ACPI";
match "subsystem" "asmc";
action "/usr/local/sbin/ataidle -s X Y";
};
SEE ALSO
ataidle(8) (ports/sysutils/ataidle), devd(8), sysctl(8)HISTORY
The asmc driver first appeared in FreeBSD 8.0.AUTHORS
Rui Paulo <[email protected]> (Google Summer of Code project)BUGS
Support for the latest models was never tested and is most likely not fully working.| April 2, 2019 | Debian |