I've had the same error by installing ubuntu server, then lxde/lxdm, then attempting to autologin to the account set up during the server install. Here's my xsession-errors file, the one similarity that I spotted was a "polkit-gnome-1-WARNING"
** Attachment added: "xsession-errors" https://bugs.launchpad.net/ubuntu/+source/lxdm/+bug/660260/+attachment/2352525/+files/xsession-errors -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/660260 Title: Xsession unable to boot after fresh install Maverick To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/lxdm/+bug/660260/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
