I have an HP Probook 4545s and it came with a Validity Fingerprint scanner. However, when I installed ubuntu I realized that the fingerprint scanner ceased to work. After some sleuthing, I found this post: Validity Fingerprint Sensor not detected ;however, it did not solve my problem. What can I do to get the driver installed so that I may use the fingerprint scanner?
I use fingerprint-gui on my Thinkpad, but I don't know if it will work for you. Here's the Launchpad page: https://launchpad.net/~fingerprint/+archive/ubuntu/fingerprint-gui