On Wed, 2012-04-25 at 23:54 +0200, Andreas Schwab wrote:

This fuzzing is what makes it much more annoying.

Interesting, I didn't think that couple of percent of pwm would be
noticable (there's probably too much ambiant noise in the lab here for
me to notice).

What if you just comment out the tickle code ?

In theory it's only needed if we haven't changed any fan speed for a
long time (the FCU can then timeout and assume we aren't driving it,
ramping up all fans to full speed). I could implement that a bit more
intelligently.

Cheers,
Ben.