So I am getting this annoying warning message when I press Enter on my KVM VM.
atkbd.c: Unknown key pressed (translated set 2, code 0xa0 on isa0060/serio0)
atkbd.c Use 'setkeycodes 00 <keycode>' to make it known.
So now whenever I hit enter, the annoying warning will be coming up and this can be easily cleaned up by using the showkey and setkeycodes command.
So from the tty console (it may not work on x-windows), i executed showkey
kb mode was UNICODE
[ if you are trying this under X, it might not work
since the X server is also reading /dev/console ]
press any key (program terminates 10s after last keypress)...
Now you can press 'Enter' (or whatever key that could cause the annoying message), it will show the keycode
keycode 28 press
It means that the Enter key is associated to keycode 28. Now you can use setkeycodes to map the Enter key.
# setkeycodes 0x00 28
0x00 here is the scancode, if you are interested on what it means, you could google it and there is some other articles out there explaining this.
Now, right after you typed the command, you should now be safed from this annoying warning message.
Should you want this be sustained across reboot, you may want to add it to /etc/rc.local
# echo 'setykeycodes 0x00 28' >> /etc/rc.local