The acpi_thermal module provides support for thermal regulation using ACPI and
various ACPI-defined thresholds, such as _PSV, _CR3, _HOT, and _CRT.
The correct setting of these thresholds may depend upon the A/C power condition;
fans might be more useful while A/C power is present, passive cooling more useful
without A/C power.
The acpi_thermal module resets the values of these thresholds to the ACPI defaults
after each A/C power transition, and they should be reset to appropriate values
after these events.
Using power_profile provides a flexible means of implementing various thermal and power
managment strategies that are appropriate for different hardware configurations.