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Old Jan 21, 2013, 11:08 PM   #1
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Question about backlight, laptop close, and sleep

Hi! I'm new to these forums (lurked here forever though) and whenever I had a problem, there was always some solution here. My question this time isn't exactly a problem, really - but I can't stop wondering. When I close my laptop, one of two things happen. Either the backlight gradually fades away (the apple logo light) or it clicks off immediately. When the former happens, I can flip the computer back up immediately and sometimes it's like the laptop forgot I ever closed it; I can use it without it falling asleep. Other times I'm online and it falls asleep on me randomly.

Any ideas as to why two different things happen? I'm really curious.
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Old Jan 21, 2013, 11:15 PM   #2
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trying to sort through the numerous questions.
first if it wont fall asleep are you on just battery power or the magsafe adapter?
if it falls asleep during use...any magnetic items near by? they are fairly sensitive and sleeps the machine.

the way light fades on the keyboard and apple logo are results of the ambient light sensor and changes when different light hits the sensor, so for example closing the lid with the brightness fairly up will mose likely fade the keyboard backlight because it thinks its bright enough you dont need the backlight to see the keys.
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Old Jan 21, 2013, 11:27 PM   #3
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No - well, the main question is, when I flip my laptop closed, the backlight either instantly clicks off or fades away, always one or the other, and both happen whether I'm plugged in or not. Laptops I see at the Apple store never "instantly click off" their lights - all of them do the fadey thing, but mine also does the instant clicky thing, and I want to know if it happens to anyone else and if there's an explanation.

No magnetic items nearby. When I say it falls asleep during use, I mean specifically that when my laptop does do that fadey thing when I close it, I can bounce the hinge right back up and the display will turn right back on instead of sleeping, and then I can use the laptop as normal. But sometimes when I try that, I use the laptop as normal for a little while and it goes back to sleep.

My keyboard backlight is always off, incidentally. Also it's a macbook air 2012 13in base model + 8gb ram
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Old Jan 22, 2013, 02:00 PM   #4
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What type of Mac do you have?

if it clicks off could be you have Flash storage (SSD) and it will instantly sleep and not fade.

provide a video? make a genius bar appointment?
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