Command not giving any output

Question

ls /sys/class/backlight/
is not giving any output on my terminal. I have Ubuntu 17.10 dual booted alongside Windows 10 on my Alienware r3 15. I need to solve this issue to try to fix my main issue Unable to change the screen brightness given in the article https://itsfoss.com/fix-brightness-ubuntu-1310/. Kindly help me find a solution.

Answer 1

That folder is empty for me too. Look for your card type with:

System Settings->Details->About

or from the command line

lspci |grep -i vga

and then you can find what driver you are using with:

lsmod

then update/create your config according to the link you posted