Hi everyone -
The slider to enable automatic brightness in PC settings is greyed out for me, although even if it's greyed out Off I can still enable it in Advanced Power Settings on the desktop - once I do so, it will be greyed out as On. The thing is, I can't quite tell if it's actually working - I tried putting my hand and phone up to where the sensor is next to the camera (I assume that's it?) and it doesn't seem to do anything. I ran the sensor diagnostic and it said no problems, so I'm fairly certain it's not a hardware issue, and this thought is supported by the fact that I have seen the automatic brightness slider not greyed out once or twice before, I just can't tell under what context. It's greyed out regardless of whether I'm plugged in or not.
EDIT: Not a hardware issue, verified responsiveness of sensor itself using the Sensors app from the app store.
Not a problem worth getting a replacement unit over, IMO. Any help?