Same issue here. This is more serious because it's probably keeps LCD from 
turning off.
Try to do this in terminal:
# sudo dmesg -c 
(This will print debug information and clear the buffer, so next time you 
execute "dmesg" it should give you empty output)

# xset dpms force off && dmesg

It will give you this output:

[  697.792010] atkbd.c: Unknown key pressed (translated set 2, code 0xf7 on 
isa0060/serio0).
[  697.792037] atkbd.c: Use 'setkeycodes e077 <keycode>' to make it known.
[  697.795261] atkbd.c: Unknown key released (translated set 2, code 0xf7 on 
isa0060/serio0).
[  697.795271] atkbd.c: Use 'setkeycodes e077 <keycode>' to make it known.

and what is worse, it won't actually let you keep your screen off. Instead it 
will:
1. turn off LCD for a second or two
2. Blink image of your desktop for a second
3. Blank your LCD (You will see black screen, but with LCD backlight still on)

I'm using MSI Wind U100

-- 
laptop key errors in messages on advent 4211 (badged msi wind) 
https://bugs.launchpad.net/bugs/261635
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