How to enable integrated fingerprint reader with fprint

Ubuntu 11.04

The integrated fingerprint reader on the ThinkPad X220 (at least) is well supported in Template:Ubuntu 11.04 (natty).

Install the necessary packages if they aren't already present.

aptitude install fprint-demo libpam-fprintd

Confirm that the needed lines in common-auth are already present.

$ grep fprint /etc/pam.d/common-auth
auth	[success=2 default=ignore]	pam_fprintd.so 

Log in to the desktop using your password. Open a terminal. In the terminal run fprintd-enroll and swipe your right index finger five times.

Now you should be able to log in by swiping your right index finger.