Webwork 2.7 on Ubuntu 12.04.3 here.
Log Out button for student or practice user seems to work, but when checking the Classlist as admin/prof., the just-logged-out-user is still shown as Active. The status changes to Incative only after inactivity time ($sessionKeyTimeout) is reached.
For practice users this means they are not available for re-login until timeout is reached.
Am I missing a proper setting somewhere? Perhaps there is an easy fix for Logout.pm?