Configure fingerprint on lenovo in Ubuntu Linux 10.04

Install needed packages
apt-get install fprint-demo libfprint0 libpam-fprint

Edit /etc/pam.d/common-auth, add string
auth sufficient pam_fprint.so
before line
auth [success=1 default=ignore] pam_unix.so nullok_secure

Launch fprint_demo, scan your finger

Then fingerprint login will be available in Gnome (didn't check in KDE).