On Wed, Jun 10, 2009 at 11:53:39AM +0200, Jan Stary wrote: > it could be quiter. Is there a way to control the fan RPM from the OS? > (Unsurprisingly, hw.sensors.adt0.fan0 is readonly.)
Some laptops provide means to control a fan via somewhat primitive ACPI-interface (a.k.a. PNP0C0B). If you are into kernel development, writing such a driver shouldn't take more than a hour or so. You have to probably examine the DSDT to find out if this is possible; see acpidump(8) for details. - Jukka.
