Hi, Just quick snip because I gotta work too ;) > * Reading the F71805F documentation, I learned that the external > circuitery needed for PWM fan speed control is completely different > from the one needed for DC fan speed control. So I wonder if it is a > good idea to let the user change between the two modes. Clearly the > BIOS should set it right. I tried to switch to DC mode and it had no > effect at all on my fan (not even on/off). I wonder if it is possible > to confuse or even damage the hardware by using the wrong mode? Yes DC/PWM settings were already removed from W83793 and imho not implemented on EHF too. You need to know what circuits are onboard -> BIOS should do that for you. If you want to implement this I would suggest just a kernel param for BIOS fixups. Rudolf
