I have a problem with the new version of Ubuntu. I used to have Ubuntu 18.04 LTS version, but I decided to change to the normal version and update it to Ubuntu 18.10. Since then I can't turn the keyboard backlight on.
I have already tried to open a terminal and type:
xset led 1 ...
xset led 32, but it doesn't work. I have also tried to turn it on by pressing Fn+F4 and that shows the picture of the keyboard backlight but without the blue progressbar.
Does somebody know how I could fix it or what the problem is?