I have Ubuntu 11.04 installed on a Lenovo Thinkpad T410 laptop with nVidia GT218 display controller. I am unable to adjust the display brightness. Pressing Fn-Home and Fn-End brings up the display brightness on-screen display and the indicated level increases or decreases as it should. But the actual display brightness does not change.

Earlier I was able to Ctrl-Alt-F1 over to a text terminal and then do Fn-Home / Fn-End to successfully change the display brightness, and then Ctrl-Alt-F8 back to the Gnome session with the new brightness. But after upgrading to 11.04 the psuedoterminals have disappeared.


I have Thinkpad W510 and followed the instruction in this page. It solved the problem that you describe and Fn+Home/End are now toggling the brightness of the screen. I hope it will work for you too.

  • Unfortunately, this didn't work.
    – nibot
    Jun 21 '11 at 5:37
  • 2
    Ah, it did work! It needed a reboot and not just restarting the X server. In case that link goes away, the solution is to add a line saying Option “RegistryDwords” “EnableBrightnessControl=1″ to the Device section of /etc/X11/xorg.conf.
    – nibot
    Jun 21 '11 at 19:21
  • This change in the xorg.conf made it work for me! Nov 14 '13 at 9:42

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