Display Brightness Ambient Light Sensor

Sit in bright light and cover the webcam, what happens? Does the screen stay the same (bright) or change (dim)?

 

Nope, it dims in low-light conditions and brightens when there's a lot of light. Think of it this way; if you're in a dark room then it's going to be easy to see what's on the screen when it's dimmed. If you're sitting in bright sunlight, then the screen needs to be brighter otherwise you won't see anything (or it will be very hard to see). The way it's working for you is the way it's supposed to work