How to make the brightness buttons work in Lenovo Z50 laptop?

I have a Lenovo Z50 laptop with ubuntu 14.04 installed.

The brightness control buttons are not working.

Searched net for this and found solution.

http://itsfoss.com/fix-brightness-ubuntu-1310/

http://askubuntu.com/questions/57236/unable-to-change-brightness-in-a-lenovo-laptop

Here is the fix:

Open a terminal and create the following configuration file, if it does not exist:

sudo touch /usr/share/X11/xorg.conf.d/20-intel.conf

Now we need to edit this file. You can use any editor be it a terminal one or graphical.

sudo gedit /usr/share/X11/xorg.conf.d/20-intel.conf

Add the following lines to this file:

Section "Device"
        Identifier  "card0"
        Driver      "intel"
        Option      "Backlight"  "intel_backlight"
        BusID       "PCI:0:2:0"

EndSection

Save it. Log out and log in back.

It is working fine now.

Thanks for the itsfoss team and stackoeverflow contributors.

One thought on “How to make the brightness buttons work in Lenovo Z50 laptop?

  1. I also faced same issue I did this

    xrandr -q | grep ” connected”
    it will gives you the output as LVDS1 connected 1680×1050+0+0 (normal left inverted right x axis y axis) 331mm x 207mm
    There LVDS1 Stands for your display .
    so now you have to do as
    xrandr –output LVDS1 –brightness 0.5
    there 0.5 stands for brightness and it ranges from 0.0 to 1.0 . 0.0 -> Full black .so you have to choose the required value of brightness .

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