Samsung 90X3A Fn Keys

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I am trying to get the Fn+F7 and Fn+F8 keys working on my Samsung
laptop, model 90X3A. These map to 'keyboard illumination down' and
'keyboard illumination up', which sets the brightness of the LEDs
behind the keyboard.

I have started a thread here
http://ubuntuforums.org/showthread.php?t=1751914 about this issue

I have managed to get the scan code (0x96 and 0x97) to respond with
the correct key code (kbdillumup and kbdillumdown) when I run
/lib/udev/keymap -i input/event4

However the keyboard backlight level still does not change when these
buttons are pressed.

According to /usr/share/doc/udev/README.keymap.txt.gz, step 6 says I
should email this list with some info as listed below.
> 6. Send the system vendor/product names, the key mapping from step 2,
>  and /tmp/udev-db.txt from step 4 to the linux-hotplug@xxxxxxxxxxxxxxx mailing
>  list, so that they can be included in the next release.

=== Vendor and product names ===
Vendor
SAMSUNG ELECTRONICS CO., LTD.

Product
90X3A

=== Key mapping ===

0x96 kbdillumup #Fn-F8
0x97 kbdillumdown #Fn-F7

=== udev.db.txt ===
An extract only, assuming that this section contains the info that is
helpful. The full length of the file was >4000 lines so if there is
any other info from it that is useful please do ask.

obtained from running
udevadm info --export-db > /tmp/udev-db.txt

> P: /devices/platform/i8042/serio0/input/input4/event4
> N: input/event4
> S: input/by-path/platform-i8042-serio-0-event-kbd
> E: UDEV_LOG=3
> E: DEVPATH=/devices/platform/i8042/serio0/input/input4/event4
> E: MAJOR=13
> E: MINOR=68
> E: DEVNAME=/dev/input/event4
> E: SUBSYSTEM=input
> E: ID_INPUT=1
> E: ID_INPUT_KEY=1
> E: ID_INPUT_KEYBOARD=1
> E: ID_SERIAL=noserial
> E: ID_PATH=platform-i8042-serio-0
> E: ID_PATH_TAG=platform-i8042-serio-0
> E: XKBMODEL=pc105
> E: XKBLAYOUT=us
> E: XKBVARIANT=colemak
> E: DEVLINKS=/dev/input/by-path/platform-i8042-serio-0-event-kbd
> E: DMI_VENDOR=SAMSUNG ELECTRONICS CO., LTD.
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