Seems rather an xorg issue, could you add your Xorg.0.log and Xorg.0.log.old to the bug?
** Package changed: indicator-applet (Ubuntu) => xorg-server (Ubuntu) -- When switching between logged in users, system hangs on black screen https://bugs.launchpad.net/bugs/625760 You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
