Ubuntu – Brightness up/down keys don’t work

brightnesslaptopUbuntu

I installed Ubuntu 16.04 on an ASUS Z450LA laptop, that has Intel HD5500 integrated graphics.

The brightness up/down keys (Fn+F5/F6) don't work; however, if I use my desktop environment to control the brightness, it works, however is annoying to not have the easy way to control brightness.

When I use xev, it shows that these keys are not generating events; it's as if the system doesn't detect them at all.

What to do?

The content of /sys/class/backlight:

/sys/class/backlight$ ls
intel_backlight

and within the intel_backlight directory, has:

actual_brightness
bl_power
brightness
device -> ../../card0-eDP-1
max_brightness
power
subsystem -> ../../../../../../../class/backlight
type
uevent

Best Answer

I don't know why the keys aren't working but, I have something useful to share.

As mentioned, you are using Ubuntu 16.04 and so this will work definitely for you.

Brightness-Controller

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