How do I maintain my manual brightness setting?

Absurd-process wrote:

I have a 2021 14" MacBook Pro running MacOS 12.2.1

In system preferences > displays, I have unchecked "automatically adjust brightness" and "True Tone"

I then manually set the brightness for my display. If I then put the computer to sleep, close the lid or turn it off, then wake it up or start it again, the brightness setting is back at the original default setting.

So, everytime it wakes up I have to reset the brightness manually.

How do I get it to maintain my manual brightness setting?

The current stable release of Monterey macOS is 12.3

Keep your Mac up to date - Apple Support

https://support.apple.com/guide/mac-help/get-macos-updates-mchlpx1065/mac

if no resolve try SafeBoot How to use safe mode on your Mac - Apple Support to sort anomalies.

reboot as normal and test.