1tzmon(7d) Devices tzmon(7d)
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6 tzmon - ACPI Thermal Zone Monitor
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9 The tzmon is a pseudo driver that serves as an ACPI thermal zone moni‐
10 tor. Thermal zones are logical regions within a computer system for
11 which ACPI performs temperature monitoring and control functions. The
12 number of thermal zones on a system with ACPI support varies. For exam‐
13 ple, some systems may have one or more thermal zones, while others may
14 have none. See the Advanced Configuration and Power Interface Specifi‐
15 cation, (ACPI) Version 3.0A. for more details.
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18 The tzmon handles thermal Zone events from ACPI and polls the tempera‐
19 ture for each zone exposed by the ACPI implementation. If threshold
20 temperatures are reached, tzmon takes appropriate action. For example,
21 if the temperature is sufficiently high and the ACPI implementation
22 supports it, tzmon initiates system shutdown.
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25 Note that by default, system temperature control functions are usually
26 performed by the BIOS and may supersede tzmon functions, depending on
27 the BIOS implementation. Also, many ACPI implementations expose no
28 thermal zones and in these cases, tzmon performs no functions.
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31 See attributes(5) for descriptions of the following attributes:
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36 ┌─────────────────────────────┬─────────────────────────────┐
37 │ ATTRIBUTE TYPE │ ATTRIBUTE VALUE │
38 ├─────────────────────────────┼─────────────────────────────┤
39 │Availability │SUNWckr │
40 ├─────────────────────────────┼─────────────────────────────┤
41 │Architecture │x86/x64 only │
42 ├─────────────────────────────┼─────────────────────────────┤
43 │Interface stability │Private │
44 └─────────────────────────────┴─────────────────────────────┘
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47 attributes(5)
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50 Advanced Configuration and Power Interface Specification, (ACPI), Ver‐
51 sion 3.0A.
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55SunOS 5.11 31 Oct 2006 tzmon(7d)