Kontron KTLX800-pITX - Manual (Page 20)

KTD-S0023-A Page 17 ACPI Thermal Management
KTLX800/pITX Software Guide
6 ACPI Thermal Management
The ACPI thermal management supports one mode: active cooling (no performance loss, but noise produc-
tion).
6.1 Active Cooling
The operating system continuously polls the temperature using the ACPI method '_TZP' (Thermal Zone
Polling). This is done automatically by Linux - for Windows
® operating systems an additional tool is needed
as Windows ® ignores the ACPI method '_TZP'.
For example the tool
CPUID HWMonitor Vers. 1.14.0 or greater
can be used.
This approach accounts the total control of the fan through the temperature control and the fan can not be
switched seperatly on and off by the ACPI methods. This is only possible when inside the BIOS Setup the
setting
Advanced/ACPI Configuration/ACPI Cooling Options/Active Trip Point is set to Disabled.
6.2 Temperature Limits
Both trip points have the setting Disabled. This is not a real deactivating of the trip points but the corres-
ponding value is set to 125°C which is the internal catastrophic temperature.
6.3 Temperature Identifier
Within operating systems (e.g. Linux) the temperature can be determined through the identifier THRM:
cat /proc/acpi/thermal_zone/ THRM/temperature