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 * Logout of a Unity-2d session

-> Logout is "fast", with "fast" meaning it is not 30 seconds (gnome-session timeout) nor 10 (Qt clipboard manager timeout on app shutdown)

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 * Have 2 screens stacked vertically
 * Enable sticky edges

-> Verify that there is a mouse barrier between the two screens

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 * Have 2 screens stacked vertically
 * Disable sticky edges

-> Verify that there is no mouse barrier between the two screens
