Fixing brightness controls on the T510 laptop

Ubuntu v10.04 (Lucid) with the Thinkpad T510 Nvidia Quadro 3100M has issues with trying to adjust the brightness controls. Apparently the issue is related to X11. To the issue, you need to edit /etc/x11/xorg.conf, and restart X:

http://www.nvnews.net/vbulletin/showthread.php?p=2204839#post2204839

Section "Screen"
 Identifier "Default Screen"
 DefaultDepth 24
EndSection

Section "Module"
 Load "glx"
EndSection

Section "Device"
 Identifier "Default Device"
 Driver "nvidia"
 Option "NoLogo" "True"
 Option  "RegistryDWords" "EnableBrightnessControl=1"
EndSection

The brightness controls will then work with this extra tweak!