When using an external monitor with my MacBook, I prefer to disable the built-in screen completely. To achieve this, I set the brightness of the built-in display to zero and disabled the auto-brightness adjustment in the System Preferences under Displays. However, I’ve encountered a frustrating issue: whenever I wake the MacBook from sleep mode, the built-in screen reverts back to being slightly lit.
This is quite inconvenient as it defeats the purpose of keeping the internal display turned off while using the external monitor. I’ve attempted to address this problem by installing BetterDisplay and experimenting with its settings. Unfortunately, none of the adjustments I’ve tried seem to resolve the brightness issue effectively.
If anyone has suggestions or tips on how to maintain the built-in screen at zero brightness after waking from sleep mode, I would greatly appreciate the insights. It would make my experience much more seamless and satisfying while working with an external monitor.