I just installed Ubuntu 16.04 in my labtop.

But the problem is that the monitor is too dim&dark and I can't make the display brighter as the brightness control slider is not shown.


normally, the slider in the red box has to be shown.

But, that control slider in the red box is not shown in my situation.

I browsed several solutions such as using

sudo apt-get install brightness-controller


grub editing with "acpi_backlight=vendor"

but, none of them solved my problem.

I also tried to editing the folder /sys/class/backlight , but, that folder is empty in my computer while the solution example says that there's something such as intel_backlight.

does anyone can help me for brighter developing environment?

I'm not sure that using gtx 960m as GPU, i5-6300hq as CPU is useful info....


Since I can't comment, here's a question or potential answer: can you try echo 200 | sudo tee /sys/class/backlight/intel_backlight/brightness? Perhaps you didn't check /sys/class/backlight as root.

  • noting exists when I use "ls /sys/class/backlight" at terminal – 이승원 Feb 4 '18 at 17:03

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