Mark Studebaker wrote: > the first is the speed 0-255 and the second is the enable 0|1. > After writing a 1 to the second value you should be able to change the > first value > in subsequent writes. I've now tried echo 128 1 > /proc/sys/dev/sensors/vt1211-isa-6000/pwm1 echo 0 1 > /proc/sys/dev/sensors/vt1211-isa-6000/pwm1 echo 0 > /proc/sys/dev/sensors/vt1211-isa-6000/pwm1 But cat /proc/sys/dev/sensors/vt1211-isa-6000/pwm1 returns "255 1" every time. best regards, Rene