I just upgraded Ubuntu from 13.04 to 13.10, and now I can't log into Active Directory; my system is integrated using PowerBroker Identity Services (PBIS), which used to be called Likewise-Open.

So far I have identified the following symptoms:

• I am able to log in with my credentials via ssh.
• The screen goes black when attempting log into my account via the login screen.

I've tried leaving the domain, purging PBIS, and re-installing the latest version of PBIS. I've been trying the troubleshooting section I found here, but I haven't had any success.

The relevant portion of the auth.log

Oct 22 09:30:26 mypc lightdm: pam_succeed_if(lightdm:auth): requirement "user ingroup nopasswdlogin" not met by user "myusername"
Oct 22 09:30:29 mypc lightdm: pam_unix(lightdm-greeter:session): session closed for user lightdm
Oct 22 09:30:29 mypc lightdm: pam_unix(lightdm:session): session opened for user myusername by (uid=0)
Oct 22 09:30:29 mypc lightdm: pam_unix(lightdm:session): session closed for user myusername
Oct 22 09:30:30 mypc lightdm: pam_unix(lightdm-greeter:session): session opened for user lightdm by (uid=0)
Oct 22 09:30:30 mypc systemd-logind[718]: New session c5 of user lightdm.
Oct 22 09:30:30 mypc lightdm: pam_ck_connector(lightdm-greeter:session): nox11 mode, ignoring PAM_TTY :1
Oct 22 09:30:31 mypc dbus[535]: [system] Rejected send message, 2 matched rules; type="method_call", sender=":1.129" (uid=110 pid=5139 comm="/usr/lib/x86_64-linux-gnu/indicator-keyboard-servi") interface="org.freedesktop.DBus.Properties" member="GetAll" error name="(unset)" requested_reply="0" destination=":1.39" (uid=0 pid=2024 comm="/usr/sbin/console-kit-daemon --no-daemon ")

My .xsession-errors log

Script for ibus started at run_im.
Script for auto started at run_im.
Script for default started at run_im.
/usr/sbin/lightdm-session: 5: exec: init: not found