https://bugs.kde.org/show_bug.cgi?id=505222
Bug ID: 505222
Summary: Fingerprint unlock rarely works after upgrade to
Plasma 6.3.4
Classification: Plasma
Product: plasmashell
Version First 6.3.4
Reported In:
Platform: Kubuntu
OS: Linux
Status: REPORTED
Severity: normal
Priority: NOR
Component: Screen locking
Assignee: [email protected]
Reporter: [email protected]
Target Milestone: 1.0
SUMMARY
With Kubuntu 24.10, I could lock the screen, leave it for a while, come back
and unlock with fingerprint. After upgrading to Kubuntu 25.04, I can only log
in with password in that case, but fingerprint works for sudo and sometimes
works for immediate unlock after window-L lock.
STEPS TO REPRODUCE
1. /etc/pam.d/kde looks like this:
auth sufficient pam_fprintd.so
auth sufficient pam_unix.so try_first_pass likeauth nullok
Actually I have a slightly more sophisticated setup whereby login uses password
and does not use the fingerprint (because it won't unlock KWallet) but screen
lock and sudo use fingerprint first falling back on password. This is described
in detail here:
https://www.reddit.com/r/Kubuntu/comments/1aew6t3/comment/kodetid/?utm_source=share&utm_medium=web3x&utm_name=web3xcss&utm_term=1&utm_content=share_button
2. Test unlocking after sleep
OBSERVED RESULT
With Kubuntu 25.04 (Plasma 6.3.4), it doesn't work, but fingerprint for sudo
works fine and window key-L to lock and immediate unlock sometimes works.
EXPECTED RESULT
With Kubuntu 24.10, it worked reliably ie. fingerprint works for immediate
unlock and unlock after sleep as well as sudo.
SOFTWARE/OS VERSIONS
Linux/KDE Plasma: Kubuntu 25.04
KDE Plasma Version: 6.3.4
KDE Frameworks Version: 6.12.0
Qt Version: 6.8.3
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