Linux, 1Password. Fingerprint Reader not working.

I don't quite know how you enroll in fingerprint authentication on Ubuntu, but for me on Gentoo using a u2f token, I had to edit a couple of files in /etc/pam.d. I suspect Ubuntu probably has a more streamlined method.

The service that 1password uses to authorize you is "polkit-1" so it's that file you want to point at whichever file contains your "either fingerprint or password" configuration.

Take note that the pam settings are very different between distros, but as an example, here is my /etc/pam.d/polkit-1 file: 

#%PAM-1.0

auth       include      system-auth-touch-w-fallback
account    include      system-auth-touch-w-fallback
password   include      system-auth-touch-w-fallback
session    include      system-auth-touch-w-fallback

And here is my  /etc/pam.d/system-auth-touch-w-fallback file. 

auth		required	pam_env.so
auth		requisite	pam_faillock.so preauth
auth		[success=2 new_authtok_reqd=2 ignore=ignore default=bad]	pam_u2f.so	cue authfile=/etc/u2f_mappings origin=pam://xxx appid=pam://xxx nouserok
auth            [success=1 new_authtok_reqd=1 ignore=ignore default=bad]      pam_unix.so nullok  try_first_pass
auth		[default=die]	pam_faillock.so authfail
auth		optional	pam_cap.so
account		required	pam_unix.so
account         required        pam_faillock.so
password	required	pam_passwdqc.so config=/etc/security/passwdqc.conf
password	required	pam_unix.so try_first_pass use_authtok nullok yescrypt shadow
session		required	pam_limits.so
session		required	pam_env.so
session		required	pam_unix.so