Quote Originally Posted by jele View Post
So I did a reinstall of Ubuntu, this time with "CSM OS" setting on the boot tab of BIOS.
And I have my keyboard backlight

mikl-dk thank you a million times!!
Yes, you have to do a reinstall. (To verify if CSM would work, I changed the setting to CSM and then booted a Live USB and did the necessary changes to activate the Fn keys with
Code:
udevadm control --reload-rules
instead of reboot and it worked - so I did a reinstall and it worked.)

You are welcome .