Copyright (c) 2003 Takanori Watanabe.
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$FreeBSD: head/share/man/man4/acpi_thermal.4 123936 2003-12-28 12:56:01Z ru $

.Dd December 27, 2003 .Dt ACPI_THERMAL 4 .Os .Sh NAME .Nm acpi_thermal .Nd ACPI Thermal Management support subsystem .Sh SYNOPSIS .Cd "device acpi" .Sh DESCRIPTION The .Nm driver provides ACPI thermal handling feature as part of the ACPI module. This module has the .Xr sysctl 8 interface and the .Xr devd 8 notification interface. Sysctls export ACPI objects as is. The .Nm driver also activates 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. These are bit-masked values. t Va hw.acpi.thermal.tz%d.temperature Current temperature. t Va hw.acpi.thermal.tz%d._PSV Temperature to start passive cooling by throttling down CPU, etc. t Va hw.acpi.thermal.tz%d._HOT Temperature to start critical suspend to disk. t Va hw.acpi.thermal.tz%d._CRT Temperature to start critical shutdown. t Va hw.acpi.thermal.tz%d._ACx Active cooling start values. The earlier value means the strengest active cooling temperature. .El

p All temperatures are represented in tenths of Kelvins. For example, 300.0K is represented by the integer 3000. To convert to Centigrades, the formula is .Li "(x - 2731.5) / 10" . .Sh NOTIFIES Notifies are passed as strings beginning with .Qq Li "!system=ACPI subsystem=Thermal" , the thermal zone instance is distingushed by the ACPI object path in the .Qq Li type= argument. The notify value is passed in the .Qq Li notify= argument.

p l -tag -width indent -compact t Li 0x80 Temperature change. t Li 0x81 Trip point change. t Li 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 -nosplit .An Michael Smith

p This manual page was written by .An Takanori Watanabe .