Devices                                                 tzmon(7d)



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 monitor-
     ing  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 implemen-
     tation. If threshold temperatures are reached,  tzmon  takes
     appropriate action.  For example, if the temperature is suf-
     ficiently 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.

ATRIBUTES
     See attributes(5) for descriptions of the  following  attri-
     butes:



     
           ATRIBUTE TYPE               ATRIBUTE VALUE       
    
     Availability                 SUNWckr                     
    
     Architecture                 x86/x64 only                
    
     Interface stability          Private                     
    


SEE ALSO
     attributes(5)


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




SunOS 5.11          Last change: 31 Oct 2006                    1