My MacBook Pro doesn't adjust the brightness when I hit the brightness controls on my keyboard (F5/F6). I've tried turning off automatic brightness to no avail. How do I use the function printed on the function keys?
MacBook Pro – Keyboard Brightness Control Buttons Disabled
keyboardmacbook propreferences
Related Solutions
Have you tried Change Keyboard Type in System Preferences -> Keyboard?
Check this question on SuperUser: https://superuser.com/questions/403493/kinesis-advantage-os-x-media-keys
Have you noticed sluggishness/hanging using the Advantage in Lion? I've had issues with the shift key sticking (not physically, but it's like CAPS LOCK is on until I hit shift again), and delete key taking multiple presses to work, and other weirdness.
Best Answer
According to OS X Daily, it's because your light sensor is detecting that you are in too bright of an environment to use the backlit keyboard. Try moving to a darker area, or covering your light sensor to see if it then lets you turn it on.