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SpringKid

macrumors 6502
Original poster
May 17, 2019
408
904
Now that Face ID (and the ambient light sensor!) is finally moved to the top bezel in landscape, does anyone know what the sensor still present on the left side bezel is?
 

SpringKid

macrumors 6502
Original poster
May 17, 2019
408
904
Ambient light sensor.
If that’s the case, what is it used for? The ambient light sensor that automatically controls the screen brightness is located on the top, as I mentioned. The sensor on the left does not do that.
 

SpringKid

macrumors 6502
Original poster
May 17, 2019
408
904
Oh, it seems to work like this:

In landscape orientation, only the ALS next to the camera is used, but in portrait orientation, both that ASL and the one on the side needs to be covered at the same time for screen dimming to happen.

Which is actually great news, since that means it doesn’t matter if you cover the landscape one while holding it in portrait orientation. 👏🏻

So much better solution than on my old 2018 Pro, where a single one was located pretty much in the top left (landscape) corner, where I often had my hand.
 
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