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+F6) it doesn't "feel" it, like if I haven't pushed anything at all.
On the other hand, combinations like
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?