DragonFly On-Line Manual Pages

AIBS(4)               DragonFly Kernel Interfaces Manual               AIBS(4)

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

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

           device acpi
           device aibs

     Alternatively, to load the driver as a module at boot time, place the
     following lines in loader.conf(5):

           acpi_load="YES"
           aibs_load="YES"

DESCRIPTION
     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 whether each sensor
     is within the specifications as defined by the motherboard manufacturer
     through ACPI.

     The aibs driver supports sensor states as follows:

     o   Temperature sensors can have a state of OK, WARN, CRIT or UNKNOWN;
         fan and voltage sensors can have a state of OK or WARN only.

     o   Temperature sensors that have a reading of 0 are marked invalid and
         their state is set to UNKNOWN, whereas all other sensors are always
         assumed valid.

     o   Temperature sensors have two upper limits (WARN and CRIT), fan
         sensors may have either only the lower limit, or, depending on the
         DSDT, one lower and one upper limit, and voltage sensors always have
         a lower and an upper limit.

     Sensor values are made available through the HW_SENSORS sysctl(3)
     interface, and can be monitored with the systat(1) sensors display,
     sensorsd(8) and sysctl(8) hw.sensors.  For example, on an Asus Stricker
     Extreme motherboard:

           $ sysctl hw.sensors.aibs0
           hw.sensors.aibs0.temp0=31.00 degC (CPU Temperature), OK
           hw.sensors.aibs0.temp1=43.00 degC (MB Temperature), OK
           hw.sensors.aibs0.fan0=2490 RPM (CPU FAN Speed), OK
           hw.sensors.aibs0.fan1=0 RPM (CHASSIS FAN Speed), WARNING
           hw.sensors.aibs0.fan2=0 RPM (OPT1 FAN Speed), WARNING
           hw.sensors.aibs0.fan3=0 RPM (OPT2 FAN Speed), WARNING
           hw.sensors.aibs0.fan4=0 RPM (OPT3 FAN Speed), WARNING
           hw.sensors.aibs0.fan5=0 RPM (OPT4 FAN Speed), WARNING
           hw.sensors.aibs0.fan6=0 RPM (OPT5 FAN Speed), WARNING
           hw.sensors.aibs0.fan7=0 RPM (PWR FAN Speed), WARNING
           hw.sensors.aibs0.volt0=1.26 VDC (Vcore Voltage), OK
           hw.sensors.aibs0.volt1=3.25 VDC ( +3.3 Voltage), OK
           hw.sensors.aibs0.volt2=4.95 VDC ( +5.0 Voltage), OK
           hw.sensors.aibs0.volt3=11.78 VDC (+12.0 Voltage), OK
           hw.sensors.aibs0.volt4=1.23 VDC (1.2VHT Voltage), OK
           hw.sensors.aibs0.volt5=1.50 VDC (SB CORE Voltage), OK
           hw.sensors.aibs0.volt6=1.25 VDC (CPU VTT Voltage), OK
           hw.sensors.aibs0.volt7=0.93 VDC (DDR2 TERM Voltage), OK
           hw.sensors.aibs0.volt8=1.23 VDC (NB CORE Voltage), OK
           hw.sensors.aibs0.volt9=1.87 VDC (MEMORY Voltage), OK

     Generally, sensors provided by the aibs driver may also be supported by a
     variety of other drivers, such as lm(4) or it(4).  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:

     o   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.

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

     o   Sensor status is supported by aibs.  The status is reported based on
         the acceptable range of values 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.

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

     As a result, sensor readings from the actual native hardware monitoring
     drivers are redundant when aibs is present, and may be ignored as
     appropriate.  Whereas on OpenBSD the native drivers have to be
     specifically disabled should their presence be judged unnecessary, on
     DragonFly the lm(4) and it(4) are not probed provided that acpi(4) is
     configured and the system potentially supports the hardware monitoring
     chip through ACPI.

SEE ALSO
     systat(1), sysctl(3), acpi(4), intro(4), sensorsd(8), sysctl(8)

HISTORY
     The aibs driver first appeared in OpenBSD 4.7 and DragonFly 2.5.

AUTHORS
     The aibs driver was written for OpenBSD and DragonFly by Constantine A.
     Murenin <http://cnst.su/>, Raouf Boutaba Research Group, David R.
     Cheriton School of Computer Science, University of Waterloo.

DragonFly 3.7                  February 9, 2010                  DragonFly 3.7