1 * Install kgreet_fprintd package
2 * Modify kdm config file
3 - modify section [X-*-Greeter]
4 add or modify PluginsLogin
7 PluginsLogin = fprintd, classic, generic, winbind
9 * Modify screensaver config file
10 - add or modify ~/.kde/share/config/kscreensaverrc
11 add PluginsUnlock in [ScreenSaver] section
14 PluginsUnlock=classic,generic,fprintd