https://bugs.kde.org/show_bug.cgi?id=527171

Carlos Espinal <[email protected]> changed:

           What    |Removed                     |Added
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                 CC|                            |[email protected]

--- Comment #6 from Carlos Espinal <[email protected]> ---
I can confirm this issue on Fedora 44 with KDE Plasma 6.8.2 (Wayland), running
on a Framework laptop.

Following the Plasma 6.8 upgrade, fingerprint authentication disappeared from
the lock screen, despite having worked previously.

The fingerprint reader itself was functioning correctly:

- `fprintd-verify` successfully recognized my enrolled fingerprints.
- `fprintd-pam` was installed.
- Fedora's `authselect` configuration had `with-fingerprint` enabled.

I was able to restore fingerprint authentication on the lock screen by running:

bash
kwriteconfig6 --file kscreenlockerrc --group Authenticators --key Fingerprint
true


After this change, the lock screen correctly displays the fingerprint
authentication option, and unlocking with my fingerprint works.

This suggests that the upgrade to Plasma 6.8 may leave the fingerprint
authenticator disabled in the screen locker configuration, even on systems
where fingerprint authentication was previously working.

Ideally, the upgrade should preserve the existing fingerprint authentication
behavior or automatically migrate the configuration.

One additional observation: the new lock screen requires manually selecting the
fingerprint icon before scanning, whereas the previous workflow allowed
fingerprint authentication directly. This introduces an additional interaction,
although fingerprint verification itself works correctly once selected.

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