Turning all screens off in Plasma-workspace and kscreenlocker while the lock screen is shown can result in the screen being unlocked when turning a screen on again.Referenceshttp://lists.fedoraproject.org/pipermail/package-announce/2016-February/177557.htmlhttps://bugs.kde.org/show_bug.cgi?id=358125https://www.kde.org/info/security/advisory-20160209-1.txthttps://bugzilla.opensuse.org/show_bug.cgi?id=964548http://lists.fedoraproject.org/pipermail/package-announce/2016-February/177454.html