[LightDM] 'lightdm --test-mode' fails with PAM error.

[Sergio]

Hello.
We're testing lightdm in Fedora (lightdm 1.2.2-15 and lightdm-gtk 1.1.6-3) as the people responsible for the Xfce spin intend to use it for the next release.

When I run 'lightdm --test-mode', it fails to open lightdm-gtk-greeter because of a PAM error.
~/.cache/lightdm/log/x-1-greeter.log says:

"Failed to open PAM session: Cannot make/remove an entry for the specified session"

I'm attaching the logs, /etc/pam.d/lightdm and /etc/lightdm/lightdm.conf

I'm not a programmer and don't understand much (actually very little of this authentication things) but it looks like some permission error.
We had some trouble at first with selinux but this was fixed in selinux-policy and lightdm seems to be working pretty fine.
I've set selinux to permissive mode. I don't know if selinux has something to do with this or not.

I also noticed that
user-authority-in-system-dir=true
is uncommented in lightdm.conf. IIRC yesterday I tried setting it to false in a local lightdm.conf, run with -c pointing to it but it made no difference.
Anyway, I'm here to test so whatever is required we do to troubleshoot this.

Thank you.
-------------- next part --------------
A non-text attachment was scrubbed...
Name: lightdm.log
Type: text/x-log
Size: 2452 bytes
Desc: not available
URL: <http://lists.freedesktop.org/archives/lightdm/attachments/20120701/40e756fe/attachment.bin>
-------------- next part --------------
A non-text attachment was scrubbed...
Name: x-1-greeter.log
Type: text/x-log
Size: 82 bytes
Desc: not available
URL: <http://lists.freedesktop.org/archives/lightdm/attachments/20120701/40e756fe/attachment-0001.bin>
-------------- next part --------------
A non-text attachment was scrubbed...
Name: lightdm
Type: application/octet-stream
Size: 716 bytes
Desc: not available
URL: <http://lists.freedesktop.org/archives/lightdm/attachments/20120701/40e756fe/attachment.obj>
-------------- next part --------------
A non-text attachment was scrubbed...
Name: lightdm.conf
Type: application/octet-stream
Size: 4154 bytes
Desc: not available
URL: <http://lists.freedesktop.org/archives/lightdm/attachments/20120701/40e756fe/attachment-0001.obj>