Hi! Sorry for my previous message, I hoped to get some response from the mailing list robot... I have recently tried to communicate with ASUS people about this chip and the answer was "information is confidential". I have a couple of ASUS motherboards here, so I want to figure out how it works myself. Now the question is if there is some simple way to control these registers? I am using 2.4.30 kernel with the lm_sensors-2.9.1. Everything works fine but PWM and some BEEP flags. Is there a simple script to be run from userspace or I should patch the driver to have raw registers control? I'm going to connect oscilloscope to fan power pins to see the effect. Any advice is appreciated. Yes, I have read doc/chips/w83781d :-) Thanks -L.