Brightness control not working- Ubuntu 12.04 LTS - Macbook pro 5,5

I have a MacBook Pro 7,1 (Mid2010) and have installed the "nvidia-current" drivers.

For me worked the following method:

Type in Terminal:

user@MacBookPro:~$ sudo nvidia-xconfig

I have done that, because the "/etc/X11/xorg.conf" file was missing. After that command it should have been created.

Then open the file:

user@MacBookPro:~$ sudo gedit /etc/X11/xorg.conf

Add in the 'Section "Device"' following line:

Option "RegistryDwords" "EnableBrightnessControl=1"

After that the Section should look like this:

Section "Device"
    Identifier     "Device0"
    Driver         "nvidia"
    VendorName     "NVIDIA Corporation"
    Option "RegistryDwords" "EnableBrightnessControl=1"
EndSection

Then after a restart the brightness controls worked perfectly fine for me.

Hope this helped you.

This worked for me. After I was able to edit xorg.conf file. I was constantly denied permission to edit until I followed the commands here

How to change xorg.conf file with permission?

Then I did what was suggested on this post.

Just for reference i'm using a Macbookpro 7.1 running Snow Leopard 10.7

Thank you I was looking for a solution for two weeks.