Does it happen if you uninstall network manager? What do you call "window freeze"? Do you still have the desktop background color and it's hanging there rather going back to gdm? If you wait 10 minutes does it continue then?
-- shutdown window freezes everytime https://launchpad.net/bugs/88015 -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs