How to enable integrated fingerprint reader with fprint

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Revision as of 11:58, 3 August 2011 by Jdthood (Talk | contribs) (→‎Ubuntu 11.04)
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Ubuntu 11.04

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

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

aptitude install 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. Open a terminal. In the terminal run fprintd-enroll and swipe your right index finger five times.

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

If you have an encrypted home directory or a password-protected default keyring then logging in from GDM by fingerprint is broken: the home directory cannot be decrypted. To deal with this, edit /etc/pam.d/gdm so that it includes /etc/pam.d/common-auth-nofinger rather than /etc/pam.d/common-auth; copy /etc/pam.d/common-auth to /etc/pam.d/common-auth-nofinger and remove the line auth [success=3 default=ignore] pam_fprintd.so from the latter.

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