I am using an ASUS ROG laptop with NVIDIA Graphics. I installed the nvidia x server driver using the driver manager in ubuntu 18.04. My volume keys work but my brightness keys do not.

I tried updating my grub and conf file as detailed in this answer but to no avail.

What can I do to make my brightness keys work or any alternatives that I can employ, such as map the command like sudo echo 100 > /sys/class/backlight/intel_backlight/brightness to a shortcut

sudo apt install brightnessctl
sudo chown root:root /usr/bin/brightnessctl
sudo chmod 4775 /usr/bin/brightnessctl

Use the following commands:

/usr/bin/brightnessctl set 2400- # To Decrease
/usr/bin/brightnessctl set 2400+ # To Increase

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