I notice this, when I pull out the magsafe to run from battery, the screen goes a little dimmer, & does not brighten to how it was when plugged until, the back lit keyboard goes off, & I move the mouse, then it brightens back up again, at the same brightness as when running off AC.
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notice when I remove the power from computer the screen gets dimmer
- Thread starter Sossity
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It does this to conserve energy while on battery source. You can turn the option off in Energy Saver (System Preferences) under Battery. See if that is better for you.
I like how the power source and battery source brightness can be adjusted accordingly. The brightness is maxed when my laptop is plugged in, every time I disconnect the Magsafe adapter, it automatically goes to 50%.
I like how the power source and battery source brightness can be adjusted accordingly. The brightness is maxed when my laptop is plugged in, every time I disconnect the Magsafe adapter, it automatically goes to 50%.
I expect it also serves as a little notification that the mains power has been disconnected, in case you do it accidentally. Nothing more annoying than packing up your computer to use it off mains only to find out you only have 20% battery left because you accidentally disconnected 6 hours ago.