Improve heuristics for automatic brightness control
@ebassi
Submitted by Emmanuele Bassi Link to original bug (#758953)
Description
Apart from bug 755768, I feel that there should be better heuristics on when to use automatic brightness control.
- Brightness should not be adjusted when on AC power; there's nothing to save in terms of power if the computer is on AC.
- Brightness should not be adjusted when there is more than one output connected to the computer; additionally, it should not be adjusted if the laptop's panel is not the primary output.
Those two adjustments would solve the following use cases:
- docked/stationary laptops
- presentations, where lighting issues are variable and not under the user's control