Auto Dim Minimum control

There is no known bug involving auto dimming or any other lighting behavior.

We are making some clarifying statements in the Rel 10.0.3.0 version of the Install Manual that adds description to the automatic transition from the ambient light sensor to the dimming bus take over.  But that does not sound like what you are describing.

At the 30,000' perspective, there are three ways to control lighting:

1.  User control;
2.  Automatic control via the bezel mounted ambient light sensor;
3.  Manual control via cockpit dimming bus controls.

For #2, there are multiple control/installer settings to refine this in maintenance mode.  One tip being added to the Rel 10.0.3.0 Installation Manual talks about setting the dimBus Transition % parameter to zero to avoid the system getting dimer and dimer as ambient lighting becomes darker (like flying from sunset into night) and then jumping to very bright at that set transition %.

For #3, there are two types of curves that can be selected in maintenance mode.   One ("Proportional") curve starts out near zero and is a straightline ramp up in brightness as the dimming bus control is increased.  The other ("AviCurve") curve has a day mode at low dimming bus settings, then jumps down to very dim and slowly increases as the dimming bus control is increased.   It is also imperative that dimming bus calibration be performed (see procedures on page 92 of the install manual) if dimming bus methods are to be used.

Hhmm.  Give me a few hours.  I'll take an IFD down to the Bat Cave in our building basement and try it out just to be sure there isn't some systemic issue.

Thanks Steve, 

I will pull logs and send