Login using fingerprint reader

Fingerprint GUI is working just fine in Ubuntu 12.04 Beta1 (LightDM). You can log in, unlock screen, and authenticate everything in the GUI and also "sudo's" in a terminal. I'm using it on an old ThinkPad R52 with integrated SGS Thomson Microelectronics Fingerprint Reader.

Install instructions: Fingerprint GUI

This is available in the repositories as well a sourcefourge

libpam-thinkfinger

ThinkFinger is a driver for the UPEK/STMicroelectronics fingerprint reader. The device is usually found either as a standalone USB device, built into USB keyboards or built into laptops (usually from Dell, IBM/Lenovo and Toshiba).

pam_thinkfinger is a Pluggable Authentication Module that allows the user authenticates through his fingerprint.

The recommended package thinkfinger-tools can be used to acquire, verify and automatically store user fingerprints.

Homepage: http://thinkfinger.sourceforge.net

PAM wiki