I have a DELL XPS L702X laptop with the nVidia GTX 555M 3GB RAM with the 120Hz 3D Screen.
I use Ubuntu 12.10 32-bit with the Experimental NVIDIA binary Xorg driver from nvidia-experimental-310(proprietary). Thanks to all the comments, I got my Fn+F4/F5 brightness working aswell. Though I did not have an /etc/X11/xorg.conf file to put the settings in, I created it manually using sudo gedit /etc/X11/xorg.conf and added only this: Section "Screen" Identifier "Default Screen" Option "RegistryDwords" "EnableBrightnessControl=1" EndSection and saved the file. I rebooted the system, and now the keys work. I hope the issue gets resolved at some point. Thanks again from a new Ubuntu user. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/762670 Title: Laptop brightness on Dell XPS not controllable To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/gnome-power-manager/+bug/762670/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs