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I have sony vaio SVE151117F, ubuntu 12.10.I used to see brightness animation upon pressing Fn+F6,F5 but not actual brightness of screen. I have tried to implement as said in but now I cant even see the brightness level animation.There is no change in brightness level of screen as usual.

I tried below links too , but still problem persists. unable to change brightness settings in sony vaio e series laptop

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Have a look at this Post. – Mitch Jun 9 '13 at 11:59

Go to the link below and download the driver by entering the commands posted their. Check the list of supported cards (probably listed their if not don't get panic give it a try. Personally mine is not their but that commands worked for me)

After installing reboot your laptop. then try this:

  1. Create the file /usr/share/X11/xorg.conf.d/15-nvidia.conf:

    gksu gedit /usr/share/X11/xorg.conf.d/15-nvidia.conf
  2. Copy/paste the following content:

     Section "Device"
      Identifier              "Device0"
      Driver                  "nvidia"
      VendorName              "NVIDIA Corporation"
      Option "RegistryDwords" "EnableBrightnessControl=1"
  3. Save the file and reboot

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dont mess that directory usr share i messed there and count open get and gui so i had to go in safe mode then remove that usr/share/x11/xx-vendor.conf

then do these.


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. 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.

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