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Magaman

macrumors regular
Original poster
Aug 14, 2009
133
1
Alright well I'm experiencing a rather strange bug and at first I thought I was going nuts. For some reason on my my MBP 2008 the screen dims itself. And auto dimming is off! I keep auto dimming off when plugged in, and while working all of a sudden the screen will dim a few ticks. I then have to F2 them back to full. I never had this issue until I installed SL, I did a clean instal BTW. Anyone else having this issue?
 
So you turned off Auto Adjust in the Displays tab of Sys. Preferences? Other than that, I don't see any reason why it would be doing this. I would say take it back, it might be a defective model, and they'll replace it or show you how to fix it. Mine was doing the same, but as soon as I turned off Auto Adjust, it stopped.

Good luck.
 
You might be moving your hands over the light sensor, making it think it's darker in the room and dimming the display. You can turn this off i think.
 
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The light sensor on the uMBPs is next to the camera, so I doubt his hands are causing the issue. It also wouldn't explain why it's happening when the option is turned off.
 
With the newer mac screens they have dynamic dimming features built-in to save energy. Its triggered by the light sensor located by the camera of the macbook. I'm not sure if it can be disabled. The dim feature in the energy saver does not refer to this.
 
With the newer mac screens they have dynamic dimming features built-in to save energy. Its triggered by the light sensor located by the camera of the macbook. I'm not sure if it can be disabled. The dim feature in the energy saver does not refer to this.

The setting to disable this is in System Preferences---->Displays--->Colours. It says something like 'Automatically Adjust Brightness as Ambient Light Changes. It certainly can be disabled, I just did it myself a few days ago :)
 
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