Hi Konstantin, On Wed, 24 Jun 2009 11:47:38 +0200, Konstantin Kletschke wrote: > It is not possible to change the pwm of the CPU fan. Changing the value > of pwm2 results in changing pwm1. May be this is only a little tiny > offset in the amounts of pwms or another tiny little bit missing. > Is there any change to get a datasheet of this chip or can somebody > provide one? > > > cat pwm1 pwm2 pwm3 > 66 > 55 > 255 > > > echo "77" >> pwm2 Note that the >> doesn't buy you anything, > is enough. These are virtual files. > > > cat pwm1 pwm2 pwm3 > 77 > 55 > 255 This is very odd. Which kernel are you running exactly? I have a hard time understanding how this can happen at all. Does writing to pwm3 change the value of pwm2, too? -- Jean Delvare