I've just bought a new laptop and I tried to create Keyboard Shortcut to manage screen backlight because the keyboard has them (on the key) but my Xubuntu 16.04 doesn't recognize the correct action.I've opened the Keyboard Manager, I add a new command, but when I push the combination (Fn+F5 or Fn+F6) it doesn't feel it, like if I haven't pushed nothing at all.On the other hand, combinations like Fn+F3 or Fn+F4 are working, also if there isn't any second action printed on the keyboard (see picture).So is it possible to activate all the keys?
Bind function keys laptop
keyboard shortcuts;configuration;keyboard;backlight;desktop shortcuts