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Display brightness control & OS X Lion

After loading OS X Lion on my MacBook Pro, I noticed that my display brightness controls no longer work. Has anyone had the same problem?

MacBook Pro, Mac OS X (10.7)

Posted on Jul 21, 2011 10:27 AM

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18 replies

Jul 22, 2011 12:33 AM in response to Sevag Pogharian

I have the same problem.


I've closed my MacBook Pro (2011 model) and am operating on the 27" LED exclusively (power, monitor and USB plugged into the MBP). I'm using Apple bluetooth keyboard, Magic Mouse and Trackpad. I've got no control over the screen brightness of my LED whatsoever. The MBP and the bluetooth keyboard both appear to manage the display brightness for my MBP. On Snow Leopard, the bluetooth keyboard controlled the LED display and MBP keyboard controlled the MBP.


I've tried restarting and opening up the MBP lid. Can't quite figure it out just yet.


Any help well appreciated.

Jul 31, 2011 10:26 PM in response to vonchapel

This suggestion worked for me on my late 2009 13" MacBook Pro (MB991LL/A). At some point after upgrading to Lion, I noticed my screen brightness controls didn't work (they had no effect). In my Keyboard preferences pane, the suggested setting "Use all F1, F2, etc. keys as standard function keys" was already unchecked, but checking it and then unchecking it returned the function to the screen brightness controls.


Thanks!

Aug 5, 2011 1:51 AM in response to Sevag Pogharian

I have upgraded my 2008 White Macbook 2.4 GHz Intelcore 2 duo 4 GB 667 MHz DDR2 SDRAM to MAC OS X LION and then installed a new 500gb hard drive replacing my old 160gb.. After installing this the brightness goes down while the the laptop is still on. It comes back again if I restart it. Then i discovered that after the brightness goes down if i hold the reduce brightness button and then hit the increase brightness button the brightness restore to normal. But again after some time the screen becomes dark and then I have to again repeat the above operation. Please offer any suggestion.


Thanks

Shashi

Aug 9, 2011 12:57 AM in response to twilbur

Same problem: MacBook Pro 2.53 GHz Intel Core 2 Duo after upgrade to Lion when I push the brighten or dim buttons on my F keys I see the image appear for brightening or diming with a circle and cross through it appearing below but nothing else happens. Tried switching "Use all F1, F2, etc" on then off but this does not fix the problem.

Oct 30, 2011 5:51 AM in response to Sevag Pogharian

Hi,

[using macbook pro quadcore lion 10.7.2]

I have tried all the suggestions to some degree of success. I can set my display brightness with the system slider. I preffered using the function key for quick changes and this now has no effect on neither keyboard back light or display brightness. 😟

Problem occured after switching off Automatic graphic switching. I only done this as that is what they say to try if you can't install adobe air 3. Very bizzare procedures to fix basic stuff? 😕

Display brightness control & OS X Lion

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