Fix Brightness Control In Linux Mint and Ubuntu

After I installed Linux Mint on my Dell Inspiron, One function that was not working was brightness control feature. I was not able to change the brightness settings using function keys. After searching online for the issue I find out that there is a bug related to Intel Graphics card. So I searched for the fix and found a solution that worked for me and can work for you too, If you have the same problem.

Find Video Card Running On Your Machine

Run the command below in the terminal to find what video card is used for the brightness control:

ls /sys/class/backlight/

Fix Brightness Control Issue With Intel Card

Open terminal and use this command to create a configuration file, if it does not exist:

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

Now we need to edit this configuration file, You can use any text editor:

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

Now add the following lines to the configuration file:

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

Save it. Logout and login again for the changes to take effect.

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