Auto brightness is not working on MacBook Pro OS X Lion

I am having the same issue. MBP 6,2 on OSX Lion. Auto brighness will dim, but will not brighten. I have to manually brightent. Manual control does not work either. I can attempt to brighten and dim with the F-key controls, but nothing happens (except for the guage popping up on the screen and going up/down). The only way to actually make the screen brighten or dim is with the slider control in the System Preferences.

I have the same auto brightness issue , however after dimming , when i do any mousepad activity it goes bright again but it takes time - about 30 seconds - not instantly

Is this a known issue in OSX lion , and any fixes available.

MacBook Pro, Mac OS X (10.7) , 2.0 GHz Intel Core i7

I'm having the same problem. This needs to be fixed

Same here - must be a bug -they'll fix it - the product is great. Also did you notice the fan is running at 10 Million RPM :-) ?

MBP Pro 15" Core 2 Duo, 4G of Memory

Walid

Same problem. I hope they fix it quickly!!

Same here.. Not solutions at this point....?

Nothing yet... But not too many people is having this problem. It scares me!!

Yep, not working. For me, it doesn't seem to dim nor brighten. Since the keys no longer work, I have to go into the control panel for Display and change it manually. Really annoying.

Hard to believe something this basic got broken in Lion and they couldn't find and fix it before the release. I mean - really...

I've got the same problem too. My brightness function key are working fine, but since I upgraded to Lion, the screen no longer automatically dims when the room goes dark. Gives you a headache after sundown!

In the first I meant also that the ambient sensor doesn't work anymore.

Auto brightness does work also on Lion, but it fades really slow and light more then on SL.

Go to:

Settings > Monitors > activate "Adjust brightness automatically" > Put the slider in the middle or more right > leave this settings window open > cover the iSight Camera on the top of the Macbook Pro monitor with your hand (on the left of the iSight Camera there is a little spot for the brightness)

Take a look at the "monitors settings window" that we leave open, the slider beginns to turn left slowly and the monitor beginns dimming, adjusting is working and depends on the ambient light. When you remove your hand from the sensor it slides back to the right.

should work on iMacs, too. 😉

Not working for me on a 2009 MacBookPro. Covering the sensor/camera causes no change. Brightness does not change from the setting I provide no matter what the external light is like, and the keyboard backlight does not come on unless I use third-party software to force it on.

Basically, the auto-brightness and keyboard backlight is completely non-functional for me in Lion. Worked just fine in Snow Leopard.

Let's hope this gets fixed in an update, and soon.

same here... bugfix for this seems to be not part of 10.7.2... fortunately, manual control still works, but I would really appreciate a fix for this. didn't find a workaround either (maybe it's just an old plist confusing lion or sth)

regards

Tried your suggestion and it does in fact adjust the brightness, but hardly at all if you have the slider set to full bright to begin with, much much more adjustment if your slider is somewhere in the middle to start.

What a shame this issue wasn't fixed in 10.7.2. I guess Apple are finding the problem too difficult to solve so far.

It worked faultlessly in Snow Leopard, like most other things.

Still facing the same problem until now. No solutions to it yet?

MacBook Pro, Mac OS X Lion (10.7.2)