Please note: All fn keys are working in Ubuntu except the brightness
keys + flightmode key, and they do what they are supposed to do.

Keys that work: (Also behave correctly!)
Keyboard-light increase / decrease,
Sound volume increase / decrease & mute.
Trackpad toggle (enable/disable)
Sleep key

Keys that do not work:
Backlight brigthness increase / decrease / toggle (on/off)
Flightmode toggle (on/off)


Troubleshooting below.


Running following command:
xev | sed -n 's/^.*state \([0-9].*\), keycode *\([0-9]\+\) *\(.*\), .*$/keycode 
\2 = \3, state = \1/p'

Result:
No fn buttons detected.

-----

Running: sudo evtest
Selecting: event12 - Asus WMI hotkeys

Result:
All fn buttons detected, except the 3 hotkeys controlling the brightness. 
(Increase, decrease & toggle (on/off)). And also the toggle Flight-mode button 
is not detected.

Not detected = no events triggered

-----

Running: acpi_listen

Result:
All fn buttons detected, except the 3 hotkeys controlling the brightness. 
(Increase, decrease & toggle (on/off)). And also the toggle Flight-mode button 
is not detected.

Not detected = no events triggered

------

I have attached the troubleshooting logs above.

** Changed in: linux (Ubuntu)
       Status: Incomplete => Confirmed

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https://bugs.launchpad.net/bugs/1460088

Title:
  Backlight control does not work on Asus Zenbook Pro UX501JW / Nvidia
  Geforce GTX 960M

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