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Xalares

Member

Registered: 2022-02-09

Posts: 45

[SOLVED] GDM can't login when yubikey plugged

Hello everybody, since the update to gdm 45.0.1-1, when I arrive to gdm to login, if my yubikey is plugged in, I can't login.
I use my yubikey to unlock my encrypted hard drive.
GDM keep asking me for my user name and when unplugg my yubikey, my account suddenly become available and I can enter my password and login.
Here is the result of

 cat journalctl -b | grep "gdm-smartcard" 

which looks linked to the issue.

oct. 10 16:45:30 xalares.tk gdm-smartcard][2602]: PAM unable to dlopen(/usr/lib/security/pam_pkcs11.so): /usr/lib/security/pam_pkcs11.so: Ne peut ouvrir le fichier d'objet partagé: Aucun fichier ou dossier de ce type
oct. 10 16:45:30 xalares.tk gdm-smartcard][2602]: PAM adding faulty module: /usr/lib/security/pam_pkcs11.so
oct. 10 16:45:36 xalares.tk gdm-smartcard][2602]: pam_faillock(gdm-smartcard:auth): User unknown
oct. 10 16:45:36 xalares.tk gdm-smartcard][2602]: gkr-pam: error looking up user information
oct. 10 16:45:38 xalares.tk gdm-smartcard][2678]: PAM unable to dlopen(/usr/lib/security/pam_pkcs11.so): /usr/lib/security/pam_pkcs11.so: Ne peut ouvrir le fichier d'objet partagé: Aucun fichier ou dossier de ce type
oct. 10 16:45:38 xalares.tk gdm-smartcard][2678]: PAM adding faulty module: /usr/lib/security/pam_pkcs11.so

Here is the content of /etc/pam.d/gdm-smartcard

auth       requisite                   pam_nologin.so
auth       requisite                   pam_faillock.so      preauth
auth       required                    pam_pkcs11.so        wait_for_card card_only
auth       required                    pam_shells.so
auth       optional                    pam_permit.so
auth       required                    pam_env.so
auth       [success=ok default=1]      pam_gdm.so
auth       optional                    pam_gnome_keyring.so

account    include                     system-local-login

password   required                    pam_deny.so

session    include                     system-local-login
session    optional                    pam_gnome_keyring.so auto_start

I hope you can help me, see you soon.

Last edited by Xalares (2023-10-11 18:57:23)

Xalares

Member

Registered: 2022-02-09

Posts: 45

Re: [SOLVED] GDM can't login when yubikey plugged

For the record this seems to be a GDM bug, I've found this https://bugs.launchpad.net/ubuntu/+sour … ug/1933027, which describe the exact behavior I get. And has been signaled there too https://gitlab.gnome.org/GNOME/gdm/-/issues/877.

Last edited by Xalares (2023-10-11 17:42:17)

hcjl

Member

From: berlin

Registered: 2007-06-29

Posts: 330

Re: [SOLVED] GDM can't login when yubikey plugged

Don't set it to [Closed], this is used by the mods for topics to be deleted. Please set it to [Solved].