Brightness will not increase after waking from sleep

Ditto to this same issue. The brightness option is missing from System Settings>Displays and the brightness slider is grayed out in the Control Center after MacBook Air is in Sleep mode for extended time. This issue started after updating macOS to 14.6.1.

Same here. Would be nice if Apple could chime in about their $1,600 product.

Try going to the Activity Monitor application. Then searching for brightness in the search bar and then clicking on the corebrightnessd process in the search results (so that it gets highlighted blue). Then using the X icon in the top bar to kill and restart it. That fixed it for me. I am on a Macbook Air with M3 chip on Sonoma 14.7.

exact same. just bought the Macboob Air M3 and already thinking of returning it. I don't want to have to restart the laptop every time I wake it up from sleep in order to adjust the screen brightness.

This definitely needs to be patched soon. To translate @mb314's solution to a command you can run on the terminal, first open the "Terminal" application and run the following command:

sudo kill -15 $(ps aux | grep corebrightness | awk 'NR==1{print $2}')

Enter user password when prompted.

I'm having the same problem and only since the latest update too!?

This is the exact same problem I have been facing since updating to the latest version of Sonoma 14.6.1 on MB M3 chip.

This worked! But it still seems insane that we’d need to do this regularly on a brand new laptop?!

thanks!