[Bug 956848] [NEW] pam_mkhomedir.so fails to create homedir in precise

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I am testing Ubuntu Precise and I think I found a bug related to creation of home directories with pam_mkhomedir.so. I found it initially in an LDAP-based setup, but to nail down the problem I did a fresh re-install, added:
session     optional          pam_mkhomedir.so umask=0077 skel=/etc/skel
to /etc/pam.d/common-session and I removed the home directory of the user used during installation, so the bug has nothing to do with network auth.

Anyway - when I login to lightdm I am successfully authenticated and the
logon screen disappears, but I am presented with a black screen and
nothing happens. I can login from text mode, the homedir is created and
afterwards I can login, even using the graphical interface.

I tried to see if this is related to lightdm or unity, but if I select
Gnome classic, I get the same problem, if I switch to GDM, the problem
remains.

I am attaching the logs from lightdm. The syslog says:
Mar 16 10:31:45 tubuntu kernel: [99829.342230] accounts-daemon[2152]: segfault at 10 ip b76c86c3 sp bfab7640 error 4 in libdbus-1.so.3.5.8[b76a3000+47000]
Mar 16 10:31:45 tubuntu kernel: [99829.342545] gdm-session-wor[29440]: segfault at 6e756279 ip b743cd4c sp bf84b250 error 4 in libc-2.15.so[b73ca000+19e000]
but I cannot say if this caused the issue or was caused by the issue.

I hope somebody can have a look at this. I can help to do some
investigating, unfortunately I don't know where to look.

** Affects: pam (Ubuntu)
     Importance: Undecided
         Status: New


** Tags: precise
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pam_mkhomedir.so fails to create homedir in precise
https://bugs.launchpad.net/bugs/956848
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