Yes! Congratulations! I've implemented authentication with PAM( http://www.reactivated.net/fprint/wiki/Pam_fprint) and it worked perfectly! / etc / pam.d / login auth required pam_securetty.so auth required pam_env.so auth sufficient pam_fprint.so auth sufficient pam_unix.so nullok try_first_pass likeauth auth required pam_deny.so See the test: Login lopan: lopan Scan right index finger on Validity VFS301 Último login:Qui Jan 5 10:46:26 BRST 2012em :0 lopan@lopan ~ $ Authentication on KDE works well. /etc/pam.d/kde auth required pam_env.so auth sufficient pam_fprint.so auth sufficient pam_unix.so try_first_pass likeauth nullok auth required pam_deny.so att., 2012/1/5 carlosv