I’m using Nixos on a Framework Laptop using the Sway window manager. I’ve been able to enable the fingerprint reader and enroll fingerprints with:
services.fprintd.enable = true;
security.pam.services.login.fprintAuth = true;
services.gnome.gnome-keyring.enable = true;
systemd.services.fprintd = {
wantedBy = [ "multi-user.target" ];
serviceConfig.Type = "simple";
};
However, I am never actually prompted for fingerprint authentication by sudo
or polkit prompts. Where would I go to actually enable that?
Try:
security.pam.services.polkit-1.fprintAuth = true;
and/or
security.pam.services.sudo.fprintAuth = true;
Does this work?
you didn’t explicitly mention that you set services.fprintd.enable = true;
- can you please confirm if you did this or not?
if you set that value then basically everything should just magically work and suggestions from @Lyndeno shouldn’t be necessary - see this line for explanation
Yes, that line is also present.
No, doesn’t seem to have had any effect.
i would suggest turning on debug logging for fprintd
and polkit
:
https://github.com/FrameworkComputer/fprintd:
Debugging
To enable debug output run systemctl edit fprintd.service
then enter:
[Service]
Environment=G_MESSAGES_DEBUG=all
Save the result and restart fprintd using systemctl restart fprintd.service
.
After that, you can grab the logs using journalctl -u fprintd.service
.
and setting security.polkit.debug = true;
i also have a framework laptop and make heavy use of the fingerprint reader… everything just worked as expected once my fingerprint was enrolled and the services.fprintd.enable
option was set true
… so let’s dig into the logs, because something seems off 
That’s helpful, didn’t realize that was available. Seems like a promising clue-
6月 19 14:57:02 agility systemd[1]: Started Fingerprint Authentication Daemon.
6月 19 14:57:02 agility fprintd[12893]: About to load configuration file '/nix/store/vk044swsc9r71wl59zgxh7215ny8y0w5-fprintd-1.94.5/etc/fprintd.conf'
6月 19 14:57:02 agility fprintd[12893]: Launching FprintObject
6月 19 14:57:02 agility fprintd[12893]: Initializing FpContext (libfprint version 1.94.9)
6月 19 14:57:02 agility fprintd[12893]: Preparing devices for resume
6月 19 14:57:02 agility fprintd[12893]: No driver found for USB device 1D6B:0003
6月 19 14:57:02 agility fprintd[12893]: No driver found for USB device 0BDA:5634
6月 19 14:57:02 agility fprintd[12893]: No driver found for USB device 8087:0032
6月 19 14:57:02 agility fprintd[12893]: No driver found for USB device 1D6B:0002
6月 19 14:57:02 agility fprintd[12893]: No driver found for USB device 1D6B:0003
6月 19 14:57:02 agility fprintd[12893]: No driver found for USB device 1D6B:0002
6月 19 14:57:02 agility fprintd[12893]: Device reported probe completion
6月 19 14:57:02 agility fprintd[12893]: Got delay inhibitor for sleep.
6月 19 14:57:02 agility fprintd[12893]: Completing action FPI_DEVICE_ACTION_PROBE in idle!
6月 19 14:57:02 agility fprintd[12893]: Not updating temperature model, device can run continuously!
6月 19 14:57:02 agility fprintd[12893]: Device Goodix MOC Fingerprint Sensor scan type changed to 'press'
6月 19 14:57:02 agility fprintd[12893]: Device Goodix MOC Fingerprint Sensor enroll stages changed to 13
6月 19 14:57:02 agility fprintd[12893]: Finger present 0
6月 19 14:57:02 agility fprintd[12893]: Finger needed 0
6月 19 14:57:02 agility fprintd[12893]: entering main loop
6月 19 14:57:02 agility fprintd[12893]: D-Bus service launched with name: net.reactivated.Fprint
6月 19 14:57:02 agility fprintd[12893]: Requesting authorization from :1.170 to call method 'ListEnrolledFingers' for device 'Goodix MOC Fingerprint Sensor'
6月 19 14:57:02 agility fprintd[12893]: Getting authorization to perform Polkit action net.reactivated.fprint.device.setusername
6月 19 14:57:02 agility fprintd[12893]: Getting authorization to perform Polkit action net.reactivated.fprint.device.verify
6月 19 14:57:02 agility fprintd[12893]: Authorization granted to :1.170 to call method 'ListEnrolledFingers' for device 'Goodix MOC Fingerprint Sensor'!
6月 19 14:57:02 agility fprintd[12893]: file_storage_discover_prints() for user '***' in '/var/lib/fprint/micah/goodixmoc/UIDF9A4A071_XXXX_MOC_B0'
6月 19 14:57:02 agility fprintd[12893]: scan_dev_storedir(): opendir("/var/lib/fprint/***/goodixmoc/UIDF9A4A071_XXXX_MOC_B0") failed: Error opening directory “/var/lib/fprint/***/goodixmoc/UIDF9A4A>
Ok, that was the clue I needed. Turns out that I had been enrolling fingerprints for the root user, rather than my normal account. using sudo fprintd-enroll USER
vs sudo fprintd-enroll
fixed the problem.
2 Likes