https://bugs.kde.org/show_bug.cgi?id=500357
Bug ID: 500357
Summary: Fingerprint authentication doesn't work in lock screen
Classification: Plasma
Product: plasmashell
Version: git-stable-Plasma/6.3
Platform: Arch Linux
OS: Linux
Status: REPORTED
Severity: normal
Priority: NOR
Component: Screen locking
Assignee: plasma-b...@kde.org
Reporter: foxepro...@gmail.com
Target Milestone: 1.0
SUMMARY
After upgrading to plasma 6.3, fingerprint authentication stopped working in
the lock screen when the session is locked indirectly. My fingerprint
authentication works properly in other applications such as sudo or polkit.
STEPS TO REPRODUCE
1. Enroll fingerprint
2. Do something such as suspending or closing laptop lid
3. Open back to lock screen
OBSERVED RESULT
When the fprintd daemon is not running, the screen locker still shows the
prompt "or scan your fingerprint on the reader". However, if I try doing that,
it shortly disappears right after without ever unlocking the session. If the
fprintd daemon is running, I never get the prompt to use my fingerprint in the
first place. Weird thing is that if I directly lock the current session using
the button in the application launcher, the prompt appears and fingerprint
authentication works fine.
EXPECTED RESULT
Fingerprint authentication should work consistently
SOFTWARE/OS VERSIONS
Operating System: Arch Linux
KDE Plasma Version: 6.3.1
KDE Frameworks Version: 6.11.0
Qt Version: 6.8.2
Kernel Version: 6.13.3-2-cachyos (64-bit)
Graphics Platform: Wayland
Processors: 12 × AMD Ryzen 5 7640U w/ Radeon 760M Graphics
Memory: 27.2 GiB of RAM
Graphics Processor: AMD Radeon 760M
ADDITIONAL INFORMATION
These are the fprintd systemd service logs if it is not running before
attempting to unlock the session:
```
Feb 18 17:44:09 archlinux systemd[1]: Starting Fingerprint Authentication
Daemon...
Feb 18 17:44:10 archlinux fprintd[8107]: Failed to install a sleep delay
inhibitor: GDBus.Error:org.freedesktop.login1.OperationInProgres>
Feb 18 17:44:10 archlinux systemd[1]: Started Fingerprint Authentication
Daemon.
Feb 18 17:44:15 archlinux fprintd[8107]: Device reported an error during
verify: device was disconnected
Feb 18 17:45:01 archlinux systemd[1]: fprintd.service: Deactivated
successfully.
```
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