dmesg - odd response

[Tom]

I have just used the dmesg command with no additional options and it
completed the output I expected but at the end it gave a series of
line-pairs all identical ....


atkbd.c: Unknown key released (translated set 2, code 0x81 on
isa0060/serio0).
atkbd.c: Use 'setkeycodes e001 <keycode>' to make it known.

What does this indicate and is there something I need to do somewhere?