I somehow managed to make it work using lightdm-gtk-greeter, but it doesn't autoload Unity and I dont' have the indicators that appeared before.
I started Unity using unity --replace in Guake and this is what I get: WARN 2014-02-24 22:05:37 unity.glib.dbus.server GLibDBusServer.cpp:579 Can't register object 'org.gnome.Shell' yet as we don't have a connection, waiting for it... ERROR 2014-02-24 22:05:37 unity.debug.interface DebugDBusInterface.cpp:196 Unable to load entry point in libxpathselect: libxpathselect.so.1.4: cannot open shared object file: No such file or directory WARN 2014-02-24 22:05:37 xim.controller XIMController.cpp:103 IBus natively supported. WARN 2014-02-24 22:05:37 unityct(io) <unknown>:0 Desktop file '/home/cristi/.local/share/applications/google-chrome.desktop' is using a deprecated format for its actions that will be dropped soon. WARN 2014-02-24 22:05:37 unityct(io) <unknown>:0 Desktop file '/usr/share/applications/clementine.desktop' is using a deprecated format for its actions that will be dropped soon. WARN 2014-02-24 22:05:37 unity.glib.dbus.server GLibDBusServer.cpp:579 Can't register object 'com.canonical.Unity.Launcher' yet as we don't have a connection, waiting for it... WARN 2014-02-24 22:05:37 unity.glib.dbus.server GLibDBusServer.cpp:579 Can't register object 'com.canonical.Unity.Dash' yet as we don't have a connection, waiting for it... WARN 2014-02-24 22:05:37 unity.glib.dbus.server GLibDBusServer.cpp:579 Can't register object 'org.gnome.SessionManager.EndSessionDialog' yet as we don't have a connection, waiting for it... WARN 2014-02-24 22:05:37 unityo (appinfo2) <unknown>:0 g_settings_set_value: value for key 'visual-bell-type' in schema 'org.gnome.desktop.wm.preferences' is outside of valid range WARN 2014-02-24 22:05:37 unityo (appinfo2) <unknown>:0 g_settings_set_value: value for key 'visual-bell-type' in schema 'org.gnome.desktop.wm.preferences' is outside of valid range ERROR 2014-02-24 22:05:37 unity.glib.dbus.server GLibDBusServer.cpp:524 DBus name lost 'org.gnome.Shell' -- You received this bug notification because you are a member of Desktop Packages, which is subscribed to lightdm in Ubuntu. https://bugs.launchpad.net/bugs/1283826 Title: lightdm hangs after updates Status in “lightdm” package in Ubuntu: Confirmed Bug description: I've updated today my Trusy Thar installation. I can't login to Unity, with my account, or a guest account. Lightdm hangs after password input, or after I click on the Guest account. Also, I used to auto-login. Now it greets me with the screen where I must input my password. After inputing it, lightdm hangs and I can't login. ProblemType: Bug DistroRelease: Ubuntu 14.04 Package: lightdm 1.9.8-0ubuntu1 ProcVersionSignature: Ubuntu 3.13.0-12.32-generic 3.13.4 Uname: Linux 3.13.0-12-generic x86_64 NonfreeKernelModules: nvidia ApportVersion: 2.13.2-0ubuntu5 Architecture: amd64 Date: Sun Feb 23 23:16:24 2014 InstallationDate: Installed on 2014-01-25 (29 days ago) InstallationMedia: Ubuntu 14.04 LTS "Trusty Tahr" - Alpha amd64+mac (20140115) LightdmConfig: [SeatDefaults] autologin-guest=false autologin-user=cristi autologin-user-timeout=0 autologin-session=lightdm-autologin SourcePackage: lightdm UpgradeStatus: No upgrade log present (probably fresh install) To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/lightdm/+bug/1283826/+subscriptions -- Mailing list: https://launchpad.net/~desktop-packages Post to : desktop-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~desktop-packages More help : https://help.launchpad.net/ListHelp