Yep this got me today. Unable to login due to YubiKey plugged in to the system. GDM sees the key and wants me to use it to authenticate, it's not set up for that and I had to pull the YubiKey to be able to log in with username & password.
Poking around in /etc/pam.d/ I found there's a few options ror smartcard configuration, and as a workaround just enabled one that allows both password and smartcard auth: $ sudo update-alternatives --config gdm-smartcard There are 3 choices for the alternative gdm-smartcard (providing /etc/pam.d/gdm-smartcard). Selection Path Priority Status ------------------------------------------------------------ 0 /etc/pam.d/gdm-smartcard-sssd-exclusive 50 auto mode 1 /etc/pam.d/gdm-smartcard-pkcs11-exclusive 30 manual mode 2 /etc/pam.d/gdm-smartcard-sssd-exclusive 50 manual mode * 3 /etc/pam.d/gdm-smartcard-sssd-or-password 40 manual mode Press <enter> to keep the current choice[*], or type selection number: -- You received this bug notification because you are a member of Ubuntu Desktop Bugs, which is subscribed to gnome-shell in Ubuntu. https://bugs.launchpad.net/bugs/1933027 Title: Gdm3 with smartcard asks for login/smartcard pin even if there is no smartcard authentication enabled To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/gdm3/+bug/1933027/+subscriptions -- desktop-bugs mailing list desktop-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/desktop-bugs
