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$FreeBSD: head/share/man/man4/acpi_thermal.4 123906 2003-12-27 16:25:11Z takawata $

.Dd July 2, 2001 .Dt ACPI_THERMAL 4 .Os .Sh NAME .Nm acpi_thermal .Nd ACPI Thermal Management Support Subsystem .Sh SYNOPSIS .Cd "device acpi"

p .Sh DESCRIPTION The .Nm driver provides ACPI thermal handling feature as a part of ACPI module. This module has sysctl interface and devd notification interface. Sysctls export ACPI objects as is. The .Nm driver also activate active cooling system in accordance with appropriate acpi object. .Sh SYSCTLS l -tag -width indent t Va hw.acpi.thermal.tz%d.active Current active system running state. t Va hw.acpi.thermal.tz%d.thermal_flags Current thermal zone status. This is bit-masked values. t Va hw.acpi.thermal.tz%d.temperature exports _TMP object that means current temperature. t Va hw.acpi.thermal.tz%d._PSV exports _PSV object that means the temperature to start passive cooling by throtting down CPU etc.. t Va hw.acpi.thermal.tz%d._HOT exports _HOT object that means the temperature to start critical suspend to disk t Va hw.acpi.thermal.tz%d._CRT exports _CRT object that means the temperature to start critical shutdown. t Va hw.acpi.thermal.tz%d._ACx exports _ACx objects that objects that means active cooling start values. The earlier value means the strengest active cooling temperature. .El All temperature is represents as tenth of Kelvin. For example 300.0K is represented as by the integer 3000. To convert to Centigrade, the formula is (x - 2731.5) / 10. .Sh NOTIFYS Notifies are passed as a string beginning with "!system=ACPI subsystem=Thermal" the thermal zone instance is distingushed by ACPI object path in "type=" argument. The notify value is passed in "notify=" argument. l -tag -width indent t Va 0x80 Temperature change. t Va 0x81 Trip point change. t Va 0x82 Device Lists change. .El .Sh SEE ALSO .Xr acpi 4 .Rs .%A "Compaq Computer Corporation" .%A "Intel Corporation" .%A "Microsoft Corporation" .%A "Phoenix Technologies Ltd." .%A "Toshiba Corporation" .%D August 25, 2003 .%T "Advanced Configuration and Power Interface Specification" .%O http://acpi.info/spec.htm .Re .Sh AUTHORS .An Michael Smith

p This manual page was written by

p .An Takanori Watanabe