windows xp - Making laptop not increase/decrease screen brightness when changing power source

When I disconnect my laptop from AC power, its screen becomes more dim, in order to save battery. When I connect it back to AC power, it becomes bright, because now it's not concerned with battery level.

I appreciate this logic, but I prefer my laptop stay at the same brightness level regardless of whether it's plugged-in or not. How can I accomplish this?

(I'm using Windows XP.)

Answer

Look at your power management settings (try Control Panel | Power) or your laptop may have a manufacturer-supplied program to handle this. Usually these let you create and/or select power management profiles, which can include screen brightness settings.

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