Provided by: freebsd-manpages_12.2-1_all bug


     aibs — ASUSTeK AI Booster ACPI ATK0110 voltage, temperature and fan sensor


     To compile this driver into the kernel, place the following line in your kernel
     configuration file:

           device aibs

     Alternatively, to load the driver as a module at boot time, place the following line in



     The aibs driver provides support for the voltage, temperature and fan sensors available
     through the ATK0110 ASOC ACPI device on ASUSTeK motherboards.  The number of sensors of each
     type, as well as the description of each sensor, varies according to the motherboard.

     The driver supports an arbitrary set of sensors, provides descriptions regarding what each
     sensor is used for, and reports the current values as well as the supposed range
     specifications of each sensor's input as defined by the motherboard manufacturer through

     The range specifications are as follows:

        Voltage sensors have a lower and an upper range specification.

        Temperature sensors have two upper specifications.

        Fan sensors may either have only the lower specification, or, depending on the DSDT, one
         lower and one upper specification.

     Sensor readings and the range specifications are made available through the sysctl(3)
     interface, and can be monitored with sysctl(8).  For example, on an ASUS V3-P5G965 barebone:

           > sysctl dev.aibs.0.{volt,temp,fan}
           dev.aibs.0.volt.0: 1192 850 1600
           dev.aibs.0.volt.1: 3312 2970 3630
           dev.aibs.0.volt.2: 5017 4500 5500
           dev.aibs.0.volt.3: 12302 10200 13800
           dev.aibs.0.temp.0: 28.0C 80.0C 95.0C
           dev.aibs.0.temp.1: 55.0C 60.0C 95.0C
  878 600 7200
  0 700 7200

           > sysctl -d dev.aibs.0.{volt,temp,fan}
           dev.aibs.0.volt.0: Vcore Voltage
           dev.aibs.0.volt.1:  +3.3 Voltage
           dev.aibs.0.volt.2:  +5 Voltage
           dev.aibs.0.volt.3:  +12 Voltage
           dev.aibs.0.temp.0: CPU Temperature
           dev.aibs.0.temp.1: MB Temperature
  CPU FAN Speed

     Generally, sensors provided by the aibs driver may also be supported by certain other
     drivers or utilities that access the ISA / LPC or I2C / SMBus devices directly.  The precise
     collection of aibs sensors is comprised of the sensors specifically utilised in the
     motherboard design, which may be supported through a combination of one or more physical
     hardware monitoring chips.

     The aibs driver, however, provides the following advantages when compared to the native
     hardware monitoring drivers or other utilities:

        Sensor values from aibs are expected to be more reliable.  For example, voltage sensors
         in many hardware monitoring chips can only sense voltage from 0 to 2 or 4 volts, and the
         excessive voltage is removed by the resistors, which may vary with the motherboard and
         with the voltage that is being sensed.  In aibs, the required resistor factors are
         provided by the motherboard manufacturer through ACPI; in the native drivers, the
         resistor factors are encoded into the driver based on the chip manufacturer's
         recommendations.  In essence, sensor values from aibs are very likely to be identical to
         the readings from the Hardware Monitor screen in the BIOS.

        Sensor descriptions from aibs are more likely to match the markings on the motherboard.

        Sensor range specifications are supported by aibs.  The range specification is reported
         for each individual sensor as suggested by the motherboard manufacturer.  For example,
         the threshold for the CPU temperature sensor is likely to be significantly higher than
         that for the chassis temperature sensor.

        Support for newer chips in aibs.  Newer chips may miss a native driver, but should be
         supported through aibs regardless.


     sysctl(3), acpi(4), sysctl(8)


     The aibs driver first appeared in OpenBSD 4.7, DragonFly 2.5, NetBSD 6.0 and FreeBSD 9.0.

     An earlier version of the driver, acpi_aiboost, first appeared in FreeBSD 7.0 and
     NetBSD 5.0.


     The aibs driver was written for OpenBSD, DragonFly, NetBSD and FreeBSD by Constantine A.
     Murenin <>, Raouf Boutaba Research Group, David R. Cheriton School of
     Computer Science, University of Waterloo.

     An earlier version of the driver, named acpi_aiboost, was written for FreeBSD by Takanori