Provide an option to have brightness re-synced after waking from sleep or starting the app by specifying a reference display (or the main display)

[fidwj01]

After waking from sleep, the internal and external display brightness levels can become out of sync until a subsequent brightness update event occurs.

Example scenario:

• Both the internal and external displays are set to 80% brightness before the system goes to sleep.
• After waking, ambient light adjustment increases the internal display brightness to 100%.
• The external display remains at the previous 80% brightness instead of syncing to the updated level.
• The external display only updates and resynchronizes after another brightness-triggering event occurs, such as:
  • Using keyboard brightness shortcuts
  • A new ambient light change event

[waydabber]

Right, the app now syncs events with user interaction or external change, but only when the app is in active/configured state, meaning all displays are recognized and normal operation is going on. Changes outside of this window are ignored.

I can add an option to re-sync displays (if absolute or nits syncing is used), but for that the user would have to appoint a display as a primary source.

[fidwj01]

Thank you. Also note that this issue is not specific to v4.3 and was already present in v4.2.3, so it does not appear to have been introduced by the new nits sync feature.