Home / ubuntu / Questions / 1237451
Accepted
Mathew Chateau
Asked: 2020-05-10 04:22:51 +0800 CST

Using Fingerprint Reader in Kubuntu 20.04. on Thinkpad T495

  • 772

I installed a fresh copy of Kubuntu 20.04. on my Thunkpad T495 (AMD CPU + Vega graphics). I can enroll my finger prints with "fprintd-enroll" successfully. So the FP reader works generally. But I cannot see any setting for enabling the FP for login. Where are these settigs? In Ubuntu 20.04. you can do it in user settings, but not in Kubuntu. Doesn't the KDE desktop have these settings at all?

I even tried the manual way and added the line: 

auth sufficient pam_fprintd.so

to:

/etc/pam.d/polkit-1 and /etc/pam.d/sudo etc...

However, it does not help. Has anybody an idea how to do it?

kubuntu thinkpad amd-processor amd-graphics

1 Answers

  1. Best Answer

    Install the applications needed:

    sudo apt install -y fprintd libpam-fprintd
sudo pam-auth-update

    Once install finishes, open /etc/pam.d/common-auth for editing

    $ sudoedit /etc/pam.d/common-auth
auth [success=1 default=ignore] pam_unix.so nullok_secure

    And modify the file adding the line shown below in bold. Make sure the order of these lines is the same as shown here.

    auth [success=2 default=ignore] pam_fprintd.so max_tries=1 timeout=10 
auth [success=1 default=ignore] pam_unix.so nullok_secure

    Save.

    Finally, enroll your fingerprint with the following command:

    fprintd-enroll $USER

    After running the command, swipe your finger across the reader 3 times to enroll your fingerprint.

    But! Login screen works uncorrected.

    • 9