SUMMARY On my ThinkPad X220 Tablet with EndeavourOS, when I put to standby multiple times the computer and resume I can't unlock the computer anymore: it gets stuck saying that the fingerprint verification failed and inputting the password or the fingerprint won't do anything until I wait a minute or so for the fingerprint verification to actually fail. In that moment I can only unlock the computer with the password even if I lock it again until the next boot. STEPS TO REPRODUCE 1. Standby and unlock a bunch of times OBSERVED RESULT I can't unlock for a minute and then I can only unlock with the password until the next boot. EXPECTED RESULT It should always be ready to unlock with either the fingerprint or the password without waiting for any phantom verification to fail. SOFTWARE/OS VERSIONS Linux: EndeavourOS KDE Plasma Version: 5.26.3 KDE Frameworks Version: 5.100.0 Qt Version: 5.15.7 ADDITIONAL INFORMATION The fingerprint sensor is called "Upek TouchChip Fingerprint Coprocessor" by the system.
I can confirm this on my system.
Can you still reproduce it? Seems to work for on Fedora 38. Though, bug #455578 bothers me, which shows a password field without function additional to the fingerprint auth.
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The following way I can always reproduce it: 1) Lock the screen with Meta+L 2) Click on the StandBy-Button 3) Wake up the laptop The fingerprint unlocking no longer works. If I don't lock the screen in beforehand but go straight to standby, unlocking via fingerprint works.
*** Bug 474528 has been marked as a duplicate of this bug. ***
Sorry, I had referenced the wrong issue in comment 2: it's correctly described now with bug #475024 (When not going to standby, but simply unlocking with Meta+L, unlocking by password instead of the fingerprint takes >20 seconds for me.)
I've logged in into my laptop via ssh and observed the journalctl output: After step 3) in comment 4 I have put my finger on the finger print read serveral times: A single time, after the first or second try the following was logged: ``` kscreenlocker_greet: pam_fprintd(kde:auth): ReleaseDevice failed: Release failed with error: The device is still busy with another operation, please try again later. ```
This should be fixed in Plasma 6 now with a new authentication architecture used for the lock screen.