1

here's my system info.

ubuntu 14.04
nvidia gt330m

when i press Fn + up or Fn + down. It doesnt change monitor's brightness. but on top-right corner brightness indicator moves left and right.

1

HOW I SOLVED IT

note: if you havent installed nvidia driver. Install it before you continue this.

in terminal

# nvidia-xconfig

this creates /etc/X11/xorg.conf . edit it.

# sudo su  // become root
# gedit /etc/X11/xorg.conf 

find Section "device" in text. add this line

Option "RegistryDwords" "EnableBrightnessControl=1"

so it shold look like it on the rightside

from this                        TO   this     
Section "Device"                  | Section "Device"
 Identifier "Device0"             |   Identifier  "Device0"
 Driver     "nvidia"              |   Driver      "nvidia"
 VendorName "NVIDIA Corporation"  |   VendorName  "NVIDIA Corporation"
                                  |   Option "RegistryDwords" "EnableBrightnessControl=1"
EndSection                        | EndSection

save changes (ctrl+S).
log out. log in.

we are done!! now Fn + Up,Down is adjusting the brightness.

Your Answer

By clicking “Post Your Answer”, you agree to our terms of service, privacy policy and cookie policy

Not the answer you're looking for? Browse other questions tagged or ask your own question.