The FN+F3 and FN+F4 key combinations are not able to control the keyboard backlight on my Asus G55VW.
I could live with a command line solution so I tried the solution proposed here: http://askubuntu.com/a/157986/71053
Unfortunately, there is no
/sys/class/leds/asus::kbd_backlight device but I instead found one named
/sys/class/leds/ath9k-phy0. I have tried echoing values to it: no error occurs, the value is changed, but the keyboard remains dark.
Any suggestion welcome.