Fixing screen brightness keys in MacBook + Ubuntu 10.10

After upgrading to Ubuntu 10.10 natty, the keyboard backlight keys and screen brightness keys did not work in macbook pro.

Make sure that Mactel-support PPA repository in enabled. It is usually deactivated during the upgrade process.
Install nvidia-bl-dkms package:
sudo apt-get update 
sudo apt-get install nvidia-bl-dkms

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