I'm a little new in Linux operative systems and I've been trying to make my laptop Vaio vpcee23el with Elementary OS (Loki) dim its backlight. I could found a way to make it in this question Intel graphics change brightness using the @Phoenix answer:
He explained that should add
sudo sh -c "echo x > /sys/class/backlight/intel_backlight/brightness" sudo sh -c "echo y > /sys/class/backlight/acpi_video0/brightness" # (optional) sudo sh -c "echo y > /sys/class/backlight/acpi_video1/brightness" # (optional)
where 0 <= x <= 4882 and 0 <= y <= 10.
in /etc/rc.local file. When I tryed it, it worked, in fact, it worked even just using
sudo sh -c "echo x > /sys/class/backlight/intel_backlight/brightness" directly in terminal.
But I would like to know if there is any way to make this work along the fn key so I don't have to type it on terminal every time i want to change my laptop brightness. s