Six month later I have the same issue. I can't login as ordinary user rose with lightdm. It is an Ubuntu 15.04 for armv7l . At the beginning I saw the issues with kwallet, which is not installed. I commented out the corresponding lines in. I have now:
root@odroid6:~# cat /etc/pam.d/lightdm #%PAM-1.0 auth requisite pam_nologin.so auth sufficient pam_succeed_if.so user ingroup nopasswdlogin @include common-auth auth optional pam_gnome_keyring.so #auth optional pam_kwallet.so @include common-account session [success=ok ignore=ignore module_unknown=ignore default=bad] pam_selinux.so close session required pam_limits.so @include common-session session [success=ok ignore=ignore module_unknown=ignore default=bad] pam_selinux.so open session optional pam_gnome_keyring.so auto_start #session optional pam_kwallet.so auto_start session required pam_env.so readenv=1 session required pam_env.so readenv=1 user_readenv=1 envfile=/etc/default/locale @include common-password and root@odroid6:~# cat /etc/pam.d/lightdm-greeter #%PAM-1.0 auth required pam_permit.so auth optional pam_gnome_keyring.so #auth optional pam_kwallet.so @include common-account session [success=ok ignore=ignore module_unknown=ignore default=bad] pam_selinux.so close session required pam_limits.so @include common-session session [success=ok ignore=ignore module_unknown=ignore default=bad] pam_selinux.so open session optional pam_gnome_keyring.so auto_start #session optional pam_kwallet.so auto_start session required pam_env.so readenv=1 session required pam_env.so readenv=1 user_readenv=1 envfile=/etc/default/locale It seems that my password is accepted (login via ssh works perfectly), but with lightdm I get only a black screen with mouse cursor. Login as user odroid which is in group nopasswdlogin with lightdm works too. After trying to login as user rose, I have to login with ssh and kill all processes owned by rose. At the end of /var/log/auth.log I see: Oct 28 19:34:17 odroid6 lightdm: pam_succeed_if(lightdm:auth): requirement "user ingroup nopasswdlogin" not met by user "rose" Oct 28 19:34:26 odroid6 lightdm: pam_unix(lightdm-greeter:session): session closed for user lightdm Oct 28 19:34:26 odroid6 lightdm: pam_unix(lightdm:session): session opened for user rose by (uid=0) Oct 28 19:34:26 odroid6 systemd-logind[651]: New session c8 of user rose. Oct 28 19:34:26 odroid6 systemd: pam_unix(systemd-user:session): session opened for user rose by (uid=0) Oct 28 19:35:10 odroid6 systemd-logind[651]: Removed session c6. Oct 28 19:35:10 odroid6 systemd: pam_unix(systemd-user:session): session closed for user lightdm -- You received this bug notification because you are a member of Ubuntu Touch seeded packages, which is subscribed to lightdm in Ubuntu. https://bugs.launchpad.net/bugs/1309535 Title: Running without pam-kwallet installed issues a warning in auth.log Status in lightdm package in Ubuntu: Won't Fix Status in pam package in Ubuntu: Won't Fix Bug description: After upgrading to lightdm 1.10.0-0ubuntu2 I started to see this error in auth.log: Apr 10 14:34:54 simon-laptop lightdm: PAM unable to dlopen(pam_kwallet.so): /lib/security/pam_kwallet.so: cannot open shared object file: No such file or directory Apr 10 14:34:54 simon-laptop lightdm: PAM adding faulty module: pam_kwallet.so This seems like a regression because with lightdm 1.10.0-0ubuntu1 or before I didn't have this error showing. FYI, I don't have the pam- kwallet package installed. $ lsb_release -rd Description: Ubuntu 14.04 LTS Release: 14.04 $ apt-cache policy lightdm pam-kwallet lightdm: Installed: 1.10.0-0ubuntu3 Candidate: 1.10.0-0ubuntu3 Version table: *** 1.10.0-0ubuntu3 0 500 http://archive.ubuntu.com/ubuntu/ trusty/main amd64 Packages 100 /var/lib/dpkg/status ProblemType: Bug DistroRelease: Ubuntu 14.04 Package: lightdm 1.10.0-0ubuntu3 ProcVersionSignature: Ubuntu 3.13.0-24.46-generic 3.13.9 Uname: Linux 3.13.0-24-generic x86_64 ApportVersion: 2.14.1-0ubuntu3 Architecture: amd64 CurrentDesktop: Unity Date: Fri Apr 18 09:12:37 2014 InstallationDate: Installed on 2014-01-26 (81 days ago) InstallationMedia: Ubuntu 14.04 LTS "Trusty Tahr" - Alpha amd64 (20140124) SourcePackage: lightdm UpgradeStatus: No upgrade log present (probably fresh install) To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/lightdm/+bug/1309535/+subscriptions -- Mailing list: https://launchpad.net/~touch-packages Post to : touch-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~touch-packages More help : https://help.launchpad.net/ListHelp