Created attachment 6157 light-locker additional preferable screen locker light-locker is well integrated with the LightDM's greeter for unlocking the session. light-locker is used by Xubuntu as preferred screen/session locker.
See ""Switch User" via 'xflock4'" https://bugzilla.xfce.org/show_bug.cgi?id=11786
This is duplicate of Bug 11254.
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