reference to login bug:
https://bugs.launchpad.net/ubuntu/+source/gdm3/+bug/1960336

snippet from journalctl:
ubuntu@ubuntu-inspiron-5482:~$ journalctl -b 0 | grep fprintd
feb 25 21:09:27 ubuntu-inspiron-5482 sudo[12402]:   ubuntu : TTY=pts/0 ; PWD=/home/ubuntu ; USER=root ; COMMAND=/usr/bin/apt install fprintd
feb 25 21:10:14 ubuntu-inspiron-5482 dbus-daemon[1737]: [system] Activating via systemd: service name='net.reactivated.Fprint' unit='fprintd.service' requested by ':1.153' (uid=1000 pid=12715 comm="fprintd-list ")
feb 25 21:10:15 ubuntu-inspiron-5482 kernel: fprintd[12718]: segfault at 40 ip 00007f96fd1b2056 sp 00007ffe9717a980 error 4 in libusb-1.0.so.0.3.0[7f96fd1a8000+f000]
feb 25 21:10:15 ubuntu-inspiron-5482 kernel: fprintd[12723]: segfault at 40 ip 00007f96fd1b2056 sp 00007f96f2ffca60 error 4 in libusb-1.0.so.0.3.0[7f96fd1a8000+f000]
feb 25 21:10:15 ubuntu-inspiron-5482 whoopsie-upload-all[12725]: INFO:root:Collecting info for /var/crash/_usr_libexec_fprintd.0.crash...
feb 25 21:10:16 ubuntu-inspiron-5482 systemd[1]: fprintd.service: Main process exited, code=dumped, status=11/SEGV
feb 25 21:10:16 ubuntu-inspiron-5482 systemd[1]: fprintd.service: Failed with result 'core-dump'.
feb 25 21:10:20 ubuntu-inspiron-5482 whoopsie-upload-all[12725]: INFO:root:Marking /var/crash/_usr_libexec_fprintd.0.crash for whoopsie upload
feb 25 21:10:20 ubuntu-inspiron-5482 whoopsie-upload-all[12725]: INFO:root:  missing (remaining: 20 s): /var/crash/_usr_libexec_fprintd.0.uploaded /var/crash/_usr_libexec_tracker-miner-fs-3.1000.uploaded
feb 25 21:10:30 ubuntu-inspiron-5482 whoopsie-upload-all[12725]: INFO:root:  missing (remaining: 10 s): /var/crash/_usr_libexec_fprintd.0.uploaded
feb 25 21:10:40 ubuntu-inspiron-5482 whoopsie-upload-all[12725]: INFO:root:  missing (remaining: 0 s): /var/crash/_usr_libexec_fprintd.0.uploaded
feb 25 21:14:02 ubuntu-inspiron-5482 polkitd(authority=local)[1769]: Operator of unix-session:2 successfully authenticated as unix-user:root to gain TEMPORARY authorization for action org.freedesktop.systemd1.manage-units for system-bus-name::1.165 [systemctl restart fprintd.service] (owned by unix-user:ubuntu)
feb 25 21:14:03 ubuntu-inspiron-5482 kernel: fprintd[13512]: segfault at 40 ip 00007f49958e0056 sp 00007ffd6ef58100 error 4 in libusb-1.0.so.0.3.0[7f49958d6000+f000]
feb 25 21:14:03 ubuntu-inspiron-5482 systemd[1]: fprintd.service: Main process exited, code=dumped, status=11/SEGV
feb 25 21:14:03 ubuntu-inspiron-5482 systemd[1]: fprintd.service: Failed with result 'core-dump'.


possibly related:
https://bugs.launchpad.net/ubuntu/+source/fprintd/+bug/1933633

from my comment there:
files updates in /etc/pam.d :
-rw-r--r-- 1 root root 1415 feb 9 15:15 gdm-smartcard-sssd-or-password
-rw-r--r-- 1 root root 1373 feb 9 15:15 gdm-smartcard-sssd-exclusive
-rw-r--r-- 1 root root 1408 feb 9 15:15 gdm-smartcard-pkcs11-exclusive
-rw-r--r-- 1 root root 1320 feb 9 15:15 gdm-password
-rw-r--r-- 1 root root 383 feb 9 15:15 gdm-launch-environment
-rw-r--r-- 1 root root 1342 feb 9 15:15 gdm-fingerprint
-rw-r--r-- 1 root root 1192 feb 9 15:15 gdm-autologin

gdm-fingerprint references:
auth required pam_fprintd.so
password required pam_fprintd.so