TZMON(4D) Devices TZMON(4D)

NAME

tzmon - ACPI Thermal Zone Monitor

DESCRIPTION

The tzmon is a pseudo driver that serves as an ACPI thermal zone
monitor. Thermal zones are logical regions within a computer system
for which ACPI performs temperature monitoring and control functions.
The number of thermal zones on a system with ACPI support varies. For
example, some systems may have one or more thermal zones, while
others may have none. See the Advanced Configuration and Power
Interface Specification, (ACPI) Version 3.0A, for more details.


The tzmon handles thermal Zone events from ACPI and polls the
temperature for each zone exposed by the ACPI implementation. If
threshold temperatures are reached, tzmon takes appropriate action.
For example, if the temperature is sufficiently high and the ACPI
implementation supports it, tzmon initiates system shutdown.


Note that by default, system temperature control functions are
usually performed by the BIOS and may supersede tzmon functions,
depending on the BIOS implementation. Also, many ACPI implementations
expose no thermal zones and in these cases, tzmon performs no
functions.

ATTRIBUTES

See attributes(7) for descriptions of the following attributes:


+---------------------+-----------------+
| ATTRIBUTE TYPE | ATTRIBUTE VALUE |
+---------------------+-----------------+
|Architecture | x86/x64 only |
+---------------------+-----------------+
|Interface stability | Private |
+---------------------+-----------------+

SEE ALSO

attributes(7)


Advanced Configuration and Power Interface Specification, (ACPI),
Version 3.0A.

October 31, 2006 TZMON(4D)