Hello.
I have a 15" MacBook Pro (2.53GHz, Unibody) and sometimes the keys to set the keys on illumination don't work and the following appears when pressing those illumination brightness keys:
Does anyone know what this means and how it can be properly solved, without sleeping the machine for a longer period of time (which seemed to work)?
Thanks in advance.
I have a 15" MacBook Pro (2.53GHz, Unibody) and sometimes the keys to set the keys on illumination don't work and the following appears when pressing those illumination brightness keys:

Does anyone know what this means and how it can be properly solved, without sleeping the machine for a longer period of time (which seemed to work)?
Thanks in advance.