I get similar messages, and I don't do domain authentication (that I
know of); samba is not installed. I'm on a fairly regular install:
single-user laptop, though I have a test user as well. Updated 14.04
install on x64. I use Unity.

I also get similar messages from compiz:

Jul  4 21:18:44 tinker compiz: PAM unable to dlopen(pam_kwallet.so): 
/lib/security/pam_kwallet.so: cannot open shared object file: No such file or 
directory
Jul  4 21:18:44 tinker compiz: PAM adding faulty module: pam_kwallet.so
Jul  4 21:18:44 tinker compiz: pam_succeed_if(lightdm:auth): requirement "user 
ingroup nopasswdlogin" not met by user "bgeron"

I have seen such messages from compiz both before and after lightdm, so
it seems not to be a version thing. Perhaps multiple causes?

I got the compiz message upon locking my screen. When I switch to the
other user, I additionally get this:

Jul  5 00:08:04 tinker lightdm: PAM unable to dlopen(pam_kwallet.so): 
/lib/security/pam_kwallet.so: cannot open shared object file: No such file or 
directory
Jul  5 00:08:04 tinker lightdm: PAM adding faulty module: pam_kwallet.so
Jul  5 00:08:04 tinker lightdm: pam_succeed_if(lightdm:auth): requirement "user 
ingroup nopasswdlogin" was met by user "myotheruser"
Jul  5 00:08:04 tinker lightdm: pam_unix(lightdm:session): session opened for 
user myotheruser by (uid=0)
Jul  5 00:08:04 tinker lightdm: pam_ck_connector(lightdm:session): cannot 
determine display-device

Maybe we should we tag compiz in this ticket as well?

bgeron@tinker ~> lsb_release -rd
Description:    Ubuntu 14.04 LTS
Release:        14.04
bgeron@tinker ~> apt-cache policy lightdm compiz pam-kwallet
lightdm:
  Installed: 1.10.1-0ubuntu1
  Candidate: 1.10.1-0ubuntu1
  Version table:
 *** 1.10.1-0ubuntu1 0
        500 http://nl.archive.ubuntu.com/ubuntu/ trusty-updates/main amd64 
Packages
        100 /var/lib/dpkg/status
     1.10.0-0ubuntu3 0
        500 http://nl.archive.ubuntu.com/ubuntu/ trusty/main amd64 Packages
compiz:
  Installed: 1:0.9.11+14.04.20140409-0ubuntu1
  Candidate: 1:0.9.11+14.04.20140423-0ubuntu1
  Version table:
     1:0.9.11+14.04.20140423-0ubuntu1 0
        500 http://nl.archive.ubuntu.com/ubuntu/ trusty-updates/main amd64 
Packages
 *** 1:0.9.11+14.04.20140409-0ubuntu1 0
        500 http://nl.archive.ubuntu.com/ubuntu/ trusty/main amd64 Packages
        100 /var/lib/dpkg/status
pam-kwallet:
  Installed: (none)
  Candidate: 0.0~git20140410-0ubuntu2.1
  Version table:
     0.0~git20140410-0ubuntu2.1 0
        500 http://nl.archive.ubuntu.com/ubuntu/ trusty-updates/universe amd64 
Packages
     0.0~git20140410-0ubuntu2 0
        500 http://nl.archive.ubuntu.com/ubuntu/ trusty/universe amd64 Packages
bgeron@tinker ~> uname -a
Linux tinker 3.13.0-30-generic #54-Ubuntu SMP Mon Jun 9 22:45:01 UTC 2014 
x86_64 x86_64 x86_64 GNU/Linux

-- 
You received this bug notification because you are a member of Desktop
Packages, which is subscribed to lightdm in Ubuntu.
https://bugs.launchpad.net/bugs/1309535

Title:
  lightdm: PAM unable to dlopen(pam_kwallet.so):
  /lib/security/pam_kwallet.so

Status in “lightdm” package in Ubuntu:
  Confirmed

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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