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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

  • The solution suggested by Darius worked for me. I have a Dell Vostro 15 with Intel integrated graphics. Thanks a ton. – Koteshwara Ananthamurthy Dec 26 '17 at 11:07
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I found this: answer

and this worked for me from his answer: solved the problem

P.S: I have asus too, but I got X550JX model.

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