Macbook Pro brightness changes every time it wakes up.

scoot2006 wrote:

Every time my laptop wakes up the brightness has reverted from full brightness to a setting that's about 3 clicks of the brightness key down from max (not sure the percentage).

I've turned off both the "automatically adjust the brightness" display setting and the "slightly dim the screen when on battery power

" power saver setting.

It happens several times a day and would be nice to have not happen.

Any ideas how to fix this?

My "About this Mac"

MacOS Catalina version: 10.15.7 (19H1419)

MacBook Pro (16-inch, 2019)

Processor: 2.3 GHz 8-Core Intel Core i9

Memory: 32 GB 2667 MHz DDR4

Graphics: AMD Radeon Pro 5500M 8 GB

Intel UHD Graphics 630 1536 MB

On the Intel Mac you can try Try resetting the SMC https://support.apple.com/en-us/HT201295

for resetting the ambient backlight sensor.

if no resolve

your mac has a Touchbar there is some NVRAM involved—

Ambient Light Sensor@80300000 <class AppleUSBDevice, id 0x10000053d, registered, matched, active, busy 0 (0 ms), retain 11>

Try resetting NVRAM/PRAM http://support.apple.com/kb/ht1379

(get at least two-three rounds of the chimes when holding the NRAM Reset)

Your Mac reads the ambient light in the room and adjusts color temperature and brightness based on these readings.

If you don't like the results, I suggest you turn the feature off.

Use True Tone on your Mac - Apple Support

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Feedback - macOS - Apple