I too end up with this issue. but I can see a error message on my laptop screen when I tried to login from my laptop into desktop.
Quote: There already appears to be an X server running on display :1. Should another display number tried? Answering no will cause GDM to attempt starting the server on :1 again. (You can change console by pressing Ctrl-Alt plus a function key, such as Ctrl-Atl-F7 to go to console 7. X servers usually run on consoles 7 and higher. After pressing 'yes' there is a popup box saying .. Quote: The specified display number was busy, so this server was started on display :2. after that it returned to normal local login screen where i can login to my laptop. -- Remote Login via XDMCP is not working in Ubuntu Gusty/7.10 https://bugs.launchpad.net/bugs/150193 You received this bug notification because you are a member of Ubuntu Bugs, which is the bug contact for Ubuntu. -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs