I am running Ubuntu on a Toshiba Satellite L355D, and I am still having a problem with overheating. I believe that I have traced a possible cause to fan control. It appears that the fan only spins up if there is a sharp increase in temperature. If the temperature increases slowly, the fan seems not to react or to react unreliably.
I downloaded the acpitool for Toshiba, and it is telling me to make sure that I have ACPI support in the kernel enabled. How do I go about doing that?