Ubuntu – How to enable keyboard backlight for Ubuntu 18.04 OS on Lenovo Thinkpad L480 laptop

18.04command linekeyboard-backlightlenovothinkpad

I have tried this option 

sudo gedit /etc/dbus-1/system.d/org.freedesktop.UPower.conf

and change setting 

<allow  send_destination="org.freedesktop.UPower.KbdBacklight"
           send_interface="org.freedesktop.DBus.Properties"/>

i have changed tag <allow> to <deny> but it didn't work.

Second option i have tried below command on terminal 

 xset led 3

This command not work for me.
Please help me out from this unnecessary bug.

Best Answer

At least with Thinkpad T480 model the keyboard led seems to be found under tpacpi::kbd_backlight:

So like proposed in comment section,

echo 2|sudo tee /sys/class/leds/tpacpi::kbd_backlight/brightness

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