Hi Can you try with ip6 disable?
cf. http://www.ubuntuforums.org/showthread.php?t=202838 ** Changed in: Ubuntu Status: Unconfirmed => Needs Info -- Network connection is slow on ubuntu machines https://launchpad.net/bugs/60977 -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs