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full brightness @ bootup

F

Fazzy

macrumors 6502
Original poster
every time i boot up my macbook air, it starts at full brightness for some reason, even though I never have it past half. Why is this?
 
My iMac does it all the time. I have to unplug everything and hold the start button for 20 seconds to clear it. I wondering too why it does this.
 
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