This bug was fixed in the package lightdm - 1.5.1-0ubuntu2
--------------- lightdm (1.5.1-0ubuntu2) raring; urgency=low
* debian/lightdm.upstart: Clear the virtual terminal after starting lightdm so startup messages are not displayed when switching users or when suspending (LP: #967229) -- Brian Murray <email address hidden> Thu, 21 Mar 2013 14:33:46 -0700
This bug was fixed in the package lightdm - 1.5.1-0ubuntu2
---------------
lightdm (1.5.1-0ubuntu2) raring; urgency=low
* debian/ lightdm. upstart: Clear the virtual terminal after starting lightdm
so startup messages are not displayed when switching users or when
suspending (LP: #967229)
-- Brian Murray <email address hidden> Thu, 21 Mar 2013 14:33:46 -0700