Yes, I have also this issue on Fujitsu E8420 BUT I have managed to get it working and wanted to publish my solution here. Im running ubuntu 11.10 and I have installed that additional driver #2, NVIDIA accelerated graphics driver (post-release updates) (version 173-updates)
So This is what I did to get screen brightness buttons working: I run "sudo nvidia-xconfig " to generate good xorg.conf file. then I added this following line to there under device "Option "RegistryDwords" "EnableBrightnessControl=1"" like this: Section "Device" Identifier "Device0" Driver "nvidia" VendorName "NVIDIA Corporation" Option "RegistryDwords" "EnableBrightnessControl=1" EndSection And I hava my xorg.conf as an attachment: ** Attachment added: "Working copy of xorg.conf for Fujitsu E8420 with fn screen brightnes" https://bugs.launchpad.net/ubuntu/+source/nvidia-graphics-drivers/+bug/562005/+attachment/2651761/+files/xorg.conf -- You received this bug notification because you are a member of Ubuntu-X, which is subscribed to nvidia-graphics-drivers in Ubuntu. https://bugs.launchpad.net/bugs/562005 Title: Backlight controls of laptops with NVIDIA NVS and Quadro FX 880M GPUs no longer function while using proprietary drivers To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu-certification/+bug/562005/+subscriptions _______________________________________________ Mailing list: https://launchpad.net/~ubuntu-x-swat Post to : ubuntu-x-swat@lists.launchpad.net Unsubscribe : https://launchpad.net/~ubuntu-x-swat More help : https://help.launchpad.net/ListHelp