Hi All, I have a HP Probook 470 G8 i have got the fingerprint reader working. However it deletes my fingerprints after the first fail, it scans them fine but deletes it right away.
Just doing a quick look around, it seems some people have better luck trying to enroll fingerprints through the terminal rather than the GUI, but ymmv:
[SOLVED] Ubuntu 22.04.01: finger print reader not working - Framework Laptop 13 / Linux - Framework Community
It might be worth a shot to try the terminal way as they describe, which involves clearing everything and reinstalling everything. My laptop's fingerprint sensor works so I can't really test when something like this isn't working unfortunately.
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That does not seem to work. infact it does the same just deletes my fingerprint off. Where would i find the error log for this?
Can you do a
sudo service fprintd status
and see if anything there is reporting a problem or not? Sometimes that will show an error with the service if there is one. Just include a screenshot here so we can see as well.
● fprintd.service - Fingerprint Authentication Daemon
Loaded: loaded (/lib/systemd/system/fprintd.service; static)
Active: active (running) since Thu 2025-02-20 14:15:28 GMT; 7s ago
Docs: man:fprintd(1)
Main PID: 26906 (fprintd)
Tasks: 6 (limit: 28240)
Memory: 1.8M
CPU: 69ms
CGroup: /system.slice/fprintd.service
└─26906 /usr/libexec/fprintd
Feb 20 14:15:28 Zorin-Lap systemd[1]: Starting Fingerprint Authentication Daemon...
Feb 20 14:15:28 Zorin-Lap systemd[1]: Started Fingerprint Authentication Daemon.
Feb 20 14:15:28 Zorin-Lap fprintd[26906]: libusb: error [udev_hotplug_event] ignoring udev action change
Feb 20 14:15:28 Zorin-Lap fprintd[26906]: libusb: error [udev_hotplug_event] ignoring udev action change
Feb 20 14:15:32 Zorin-Lap fprintd[26906]: Deleted stored finger 7 for user alex as it is unknown to device.
~
Ok so there is a couple of errors going on that we can see. At least it confirms that you're not going crazy and something is wrong 
. From what I can see, there are a few options to try.
Some people say that if they add just more than one single fingerprint for a finger, that that solves the problem. May or may not work, but worth a shot.
If you look at this post:
XPS 13 Plus (9320) Fingerprint : r/pop_os
Even though it's regarding a Dell, the issue is the same. Edits 2 and 3 to the original post are what I would look at, as one is a simple fix (edit 2) and 3 shows a link to here:
[[TRACKING] Fingerprint scanner compatibility with linux (ubuntu, fedora, etc) - Framework Laptop 13 / Linux - Framework Community][TRACKING] Fingerprint scanner compatibility with linux (ubuntu, fedora, etc) - #214 by Devyn_Cairns - Linux - Framework Community
Which shows a script someone has created to clear fingerprints and help resolve some issues.
NOTE: I don't know this script or anything that it may or may not do, but it appears to be a fairly basic script to just clear fingerprints. But based on the fact they offer a checksum, I'd wager it's not a negative actor. And by all the positives shown, seems like it might be worth a go.