Comment 2 for bug 296489

> 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.