Adjust brightness of backlight i3w-Manjaro

[Gerhard]

To adjust the brightness in i3w on Manjaro or Arch:

1. 
   
   Code:

   sudo pacman -S brightnessctl
   
   
2. Add this keybindings to your config:
   
   Code:

   #Adjust Brightness with brightnessctl
bindsym XF86MonBrightnessUp exec --no-startup-id brightnessctl -q s  +1
bindsym XF86MonBrightnessDown exec --no-startup-id brightnessctl -q s  1-

           
Reload your config and adjust brightness with FN+F1 and FN+F2