Fully Reduced Screen brightness goes up by itself.

Hi everyone,
Not too long ago I realised that when I fully reduce my screen brigtness (to leave my laptop ON before going to sleep), my macbook air automatically (by itself) increases it slightly. In other words, instead of the screen being totally black at night, it becomes bright, which of course is not what I want. It never happened to me before, or may be I have never really paid too much attention to it.
I tried to look into my Energy Saver preferences, but I could not find anything unusual there. Has anyone of you experienced anything similar or may be you have a solution to my problem?
Thank you very much in advance.

Have you tried: Go to system preferences>displays and check off "automatically adjust brightness as ambient light changes" ?

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The screen of my imac always goes to the maximum exposure. Then the light icon on the screen. After reducing the brightness goes my screen after a few minutes back to the maximum intensity with the brightness icon back on my TV screen.

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Try resetting the SMC and if that doesn't work then reset the PRAM too.
SMC RESET
Shut down the computer.
Unplug the computer's power cord and all peripherals.
Press and hold the power button for 5 seconds.
Release the power button.
Attach the computers power cable.
Press the power button to turn on the computer.
PRAM RESET
Shut down the computer.
Locate the following keys on the keyboard: Command, Option, P, and R. You will need to hold these keys down simultaneously in step 4.
Turn on the computer.
Press and hold the Command-Option-P-R keys. You must press this key combination before the gray screen appears.
Hold the keys down until the computer restarts and you hear the startup sound for the second time.
Release the keys.

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How to reduce screen brightness below standard level in ThinkPad T520 ?
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Solved!
Go to Solution.

The latest Intel graphics driver (from Lenovo) is here:
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This should provide a decent lower bound to brightness. If the install complains about unsupported hardware, force the install using Device Manager and Have Disk. (Something like this: http://forums.laptopvideo2go.com/topic/11997-have-disk-method-for-windows-7-vista/ )
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Hi,
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any ideas ?
best regards
fidel

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ang188 wrote:
I reduced the brightness to the lowest setting on my keyboard, but it is still bright.
The problem is not so much on the graphics, its more on the brightness of the white background & black text.
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Fully Reduced Screen brightness goes up by itself.

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