F43 Fingerprint device disconnected mid enroll

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1

Enrolling a fingerprint in F43

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image729×560 19.1 KB

Jan 11 19:39:12 fedora systemd[1]: Started user@0.service - User Manager for UID 0.
Jan 11 19:39:12 fedora audit[1]: SERVICE_START pid=1 uid=0 auid=4294967295 ses=4294967295 subj=system_u:system_r:init_>
Jan 11 19:39:12 fedora systemd[1]: Started session-c2.scope - Session c2 of User root.
Jan 11 19:39:12 fedora sudo[193567]: pam_systemd(sudo:session): Failed to check if /run/user/0/bus exists, ignoring: P>
Jan 11 19:39:12 fedora sudo[193567]: pam_unix(sudo:session): session opened for user root(uid=0) by johannes(uid=1000)
Jan 11 19:39:12 fedora audit[193567]: AUDIT1105 pid=193567 uid=1000 auid=1000 ses=3 subj=unconfined_u:unconfined_r:unc>
lines 29826-29854/29854 (END)

The device is build in my Lenovo p61


 lsusb
Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
Bus 002 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub
Bus 003 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
Bus 003 Device 002: ID 27c6:6594 Shenzhen Goodix Technology Co.,Ltd. Goodix USB2.0 MISC
Bus 003 Device 003: ID 174f:11af Syntek Integrated Camera
Bus 003 Device 004: ID 2ce3:9563 Generic EMV Smartcard Reader
Bus 003 Device 005: ID 8087:0033 Intel Corp. AX211 Bluetooth
Bus 004 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub
2

In my experience the fprintd is vulnerable against multiple requests triggered in quick succession (as during enrollment). The fprintd reports an error and does not respond afterwards for a short period (i.e. the fprint device is locked for subsequent requests). An enrollment GUI may treat such transient error as unrecoverable.

In case the problem persists then

  • inspect fprintd diagnostics using journalctl --unit fprintd.service
  • reset the service via systemctl restart fprintd.service
  • enroll via command-line (see man fprintd-enroll)
  • enable (temporarily) debugging to gather additional diagnostics
$ sudo systemctl edit --drop-in disabled.conf --stdin fprintd.service <<EOF
[Service]
Environment=G_MESSAGES_DEBUG=all
EOF
$ sudo systemctl daemon-reload
3

The fingerprint option is apparnetly not completely integrated in GNU/Linux. I´ve stopped using it until a working solution comes around.