> Method 1

Shows nothing.

> Method 2

> sudo showkey -u | tee -a hotkey-log.txt

There is no -u option in showkey .
If you mean -s .... there is no event when pressing the keys. 
But after that the keyboard does not work any more under XWindows.

> Method 3

>      Run sudo tail -f /var/log/acpid

There is no /var/log/acpid.


> Method 4

No result


dmi shows

SAMSUNG ELECTRONICS CO., LTD.
NC10
Not Applicable

>From dmesg; 
[  631.406391] atkbd.c: Unknown key pressed (translated set 2, code 0x86 on 
isa0060/serio0).
[  631.406426] atkbd.c: Use 'setkeycodes e006 <keycode>' to make it known.

pressing Wlan off key.

[  726.226897] atkbd.c: Unknown key pressed (translated set 2, code 0x84 on 
isa0060/serio0).
[  726.226936] atkbd.c: Use 'setkeycodes e004 <keycode>' to make it known.

pressing lcd off key.

[  786.009266] atkbd.c: Unknown key pressed (translated set 2, code 0x83 on 
isa0060/serio0).
[  786.009295] atkbd.c: Use 'setkeycodes e003 <keycode>' to make it known.

pressing battery key.

-- 
Samsung NC10 FN Keys WIFI/Battery/LCD off not working
https://bugs.launchpad.net/bugs/296489
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