What to do if fprintd requires a password when registering your fingerprint

When I was using fprintd on Arch Linux, I suddenly was asked for privileges when registering my fingerprint, so I investigated and managed to do it.

Change part

xml:/usr/share/polkit-1/actions/net.reactivated.fprint.device.policy


<action id="net.reactivated.fprint.device.enroll">
  <description>Enroll new fingerprints</description>
  (Omission)
  <defaults>
    <allow_any>no</allow_any>
    <allow_inactive>no</allow_inactive>


-   <allow_active>auth_self_keep</allow_active>

+   <allow_active>yes</allow_active>


  </defaults>

Rewrite the element of \ <allow_active > from "auth_self_keep" to "yes".

After that, restart the polkit daemon (systemctl restart polkit.service in a systemd environment) and you should be able to register your fingerprint without a password.

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