> > > Bit 0 of conf register 2 enables the pwm output, I think that if > > > the bit iscleared, the fan will never rotate. Even if in automatic > > > mode. But it is not verified yet... > > > > Please try and tell me. > > Clearing that bit disables PWM output, so the fan doesn't run at all! Then you don't want to allow the user to do it. At all. -- Jean Delvare http://www.ensicaen.ismra.fr/~delvare/