Thermal management, Active cooling, Acpi wakeup – Kontron KTA55-pITX User Manual
Page 22: Wake on lan, Linux (debian distributions), 8thermal management, 9acpi wakeup, 1 active cooling, 1 wake on lan
KTD-S0043-A
Page 19
Thermal Management
KTA55/pITX Software Guide
8
Thermal Management
The thermal management supports one mode: active cooling (no performance loss, but noise production).
8.1
Active Cooling
Only the AMD
®
Hudson-E1 Controller Hub controls the fan. The ACPI interface has no influence on the fan
control - no 'Thermal Zone' part is implemented.
An Internal Micro-Controller (IMC) based on a 8051 core manages the temperature measurement and fan
control. The Bios Setup makes it possible to define different fan control algorithm, see the submenu '
Ad-
vanced/Miscellaneous/Active Cooling Configuration
'. You can choose between the LINEAR MODE and the
STEP MODE (entry '
Fan Speed Mode
'). The STEP MODE holds the fan speed constant within a temperature
range. See the submenu '
Enhanced Fan Control
' where you can define maximal 8 steps.
9
ACPI Wakeup
One wake event is possible: Wake On LAN (WOL).
9.1
Wake On LAN
9.1.1
Linux (Debian distributions)
Linux normally disables the wake functionality. This can be verified within the terminal with
cat /proc/acpi/wakeup
The following command allows the activation of a wake function (example
USB0):
echo USB0 > /proc/acpi/wakeup