Public bug reported:
Situation:
- Freshly installed machine with Kubuntu 14.04 i386
- Create local user
- The home directory is mounted from a server using NFS4 (no Kerberos)
On login, lightdm claims that the password of the user is incorrect. The
same user can log in without any problems on the console and can access
his files. If I create a local home directory (w/o NFS), the user can
log in via lightdm as well.
What I've seen so far with NFS home directory:
After a login attempt, /var/log/syslog shows:
[...]
Apr 15 14:42:30 pc1326 kernel: [73998.523174] lightdm[13641]: segfault at 0 ip
b72a41c7 sp bfd2b2f0 error 4 in libc-2.19.so[b723f000+1a9000]
In /var/log/auth.log:
[...]Apr 15 14:42:30 pc1326 lightdm: pam_succeed_if(lightdm:auth): requirement
"user ingroup nopasswdlogin" not met by user "testuser2"
Apr 15 14:42:30 pc1326 lightdm: pam_kwallet(lightdm:auth): pam_sm_authenticate
In /var/log/lightdm/lightdm.log:
[...]
[+74103.53s] DEBUG: Session pid=13162: Greeter start authentication for
testuser2
[+74103.53s] DEBUG: Session pid=13689: Started with service 'lightdm', username
'testuser2'
[+74103.53s] DEBUG: Session pid=13689: Got 1 message(s) from PAM
[+74103.53s] DEBUG: Session pid=13162: Prompt greeter with 1 message(s)
[+74103.53s] DEBUG: Session pid=13162: Continue authentication
[+74103.67s] DEBUG: Session pid=13689: Terminated with signal 11
[+74103.67s] DEBUG: Session: Failed during authentication
[+74103.67s] DEBUG: Session pid=13162: Authenticate result for user testuser2:
Authentication stopped before completion
[+74103.67s] DEBUG: Seat: Session stopped
lightdm:
Installed: 1.10.0-0ubuntu3
Description: Ubuntu 14.04 LTS
Release: 14.04
** Affects: lightdm (Ubuntu)
Importance: Undecided
Status: New
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https://bugs.launchpad.net/bugs/1308043
Title:
Kubuntu 14.04: lightdm crashes when user has NFS mounted home
directory
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