I've just had exactly the same error when I upgraded this machine to Natty last night. I'll attach the same three files to see if anything can help. As per last time if there's anything else I can do to help track down the issue let me know. The workaround is simply just to not select "Default" at the Login Screen but to instead select "Lubuntu" from the dropdown box and it all then works as expected.
** Attachment added: "lxdm.conf" https://bugs.launchpad.net/ubuntu/+source/lxdm/+bug/660260/+attachment/2183108/+files/lxdm.conf -- 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