On my samsung np900x3c, the key bindings for Fn keys are not working despite following the guidelines for key maps. I followed the following guide.
http://natjohan.info/linux-on-samsung-np900x3c.html (http://natjohan.info/linux-on-samsung-np900x3c.html)
Any advice what could make it work. Currently no Fn key works.
You can use a program called xev to check if your function keys are registering.
Open a terminal and start xev -
xev
Click the titlebar of the white xev window (or place the mouse in it) to make that window active. Once it's active, when you press a key on the keyboard, you will see it's keycodes show in the terminal window. You can test it by pressing "b" or any other letter.
Press your function keys and see what the output is - the volume up key is usually something like XF86AudioRaiseVolume. Note what the output is for those keys, if they are working, you may be able to use them directly in key bindings.
In the guide you used, the 0xCE, 0x88 look like keysyms for the FN keys, see if they maych up with the files you created.