I've got an old Toshiba Satellite 220c that runs really damn hot. It apparently depended on Windows to tell it when it needed the fan. (You'd think this would be set in the BIOS, with possibly the ability to over-ride, but nooooooo.)
Only utilities I've found for this require Gnome, and all it's got on it is Fluxbox. (I'm just using it as an X terminal.) Anyone know of a way to do this that doesn't require one of the large DTEs?