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["j. rose" <rose@xxxxxxxx>]

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)

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