This bug was fixed in the package lightdm - 1.1.4-0ubuntu1
---------------
lightdm (1.1.4-0ubuntu1) precise; urgency=low
* New upstream release.
- Change session directory once user permissions are set so it works
on NFS filesystems that don't allow root to access files. (LP: #877766)
- Restructure session code so the PAM authentication is run in its
own process. (LP: #881466)
- Set PAM_XDISPLAY and PAM_XAUTHDATA pam items (LP: #862559)
- Don't send session stdout to .xsession-errors
- Fix Qt bindings crash when removing a user
-- Robert Ancell <[email protected]> Thu, 01 Mar 2012 20:54:07
+1100
** Changed in: lightdm (Ubuntu)
Status: Fix Committed => Fix Released
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https://bugs.launchpad.net/bugs/877766
Title:
lightdm login fails with NFS home and strict (mode 0700) permissions
Status in Light Display Manager:
Fix Released
Status in “lightdm” package in Ubuntu:
Fix Released
Status in “lightdm” source package in Oneiric:
Triaged
Bug description:
Lightdm appears not to be able to log in a user if all of the
following are true:
1. They've got an NFS-mounted home directory
2. NFS is configured in the usual manner; ie, root privileges do not allow
access to arbitrary remote files
3. The user's home directory permissions are such that "other" cannot access
the directory (ie, mode 0700)
In this situation, the password is accepted and the screen clears.
Rather than bringing up the desktop as expected, a couple of seconds
pass and we're returned to the lightdm screen. This yielded a message
in one of the /var/log/lightdm logs which I've just discovered was
overwritten by subsequent successful logins. I'll recreate this and
update the bug tonight.
Workaround was to chmod the user's homedir to 0711 which allowed
lightdm to work properly.
Release is Ubuntu 11.10 with all updates as of 17 Oct 2011 at roughly
10pm EDT. Lightdm package is 1.0.1-0ubuntu6.
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