I can confirm that autologin failure in Xubuntu 12.04.3 (32bit or 64bit) is due to home directory encryption. If you DO NOT encrypt your home directory on installation and your /etc/lightdm/lightdm.conf looks like the following, autologin WILL work. You DO NOT have to do anything else, such as the disabling of asking for a password on login in System > Users and Groups.
[SeatDefaults] autologin-user=yourusernamehere autologin-user-timeout=0 user-session=xubuntu greeter-session=lightdm-gtk-greeter allow-guest=false -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1029926 Title: Auto-login does not work with lightdm To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/lightdm/+bug/1029926/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs