Originally Posted by Parlapipas

LOL. You need to go back to your systemui file at /etc/systemui and make sure your file looks like this for the lock screen button:

<powerkeymenu path="/">
<title>powerup_application_title</title>
<po>osso-powerup-shutdown</po>

<menuitem priority="700" name="powerup_memainmenu_lockscreen">
<return>1</return>
<po>osso-powerup-shutdown</po>
</menuitem>

and for the lock device one like this:

<menuitem priority="100" name="powerup_memainmenu_lockdevice" disabled="yes">
<keyfile>/var/run/mce/call</keyfile>
<return>4</return>
<po>osso-powerup-shutdown</po>
<disabled_reason name="powerup_ib_device_lock_not_available">
<po>osso-powerup-shutdown</po>
</disabled_reason>
</menuitem>