MBP keeps brightening screen on it's own???

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I like to keep the brightness on my MBP down around the 20% range when I'm in class watching slides (ie: darkened room).
However, my MBP jacks it back up to 50% brightness every couple of minutes.

I'm pretty sure that it has to do with the lumen sensor in the speaker plate the illuminates the keyboard when it senses there's not enough light?

How can I prevent this from happening?

J.
 

pigoo3

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Your Mac's Specs
2017 15" MBP, 16gig ram, 1TB SSD, OS 10.15
- Apple Menu
- System Preferences
- Displays
- deselect the "Automatically Adjust Brightness" setting

* Nick
 

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