Comment 8 for bug 1404558

This might be related to a backport issue in the upstream stable patch below:

  commit 4fab9071950c2021d846e18351e0f46a1cffd67b
  Author: Neal Cardwell <email address hidden>
  Date: Thu Aug 14 12:40:05 2014 -0400

    tcp: fix tcp_release_cb() to dispatch via address family for mtu_reduced()

I have produced some test kernels with the backport corrected, could you try the kernels below to confirm if this is indeed the underlying issue. Kernels are at the URL below:

    http://people.canonical.com/~apw/lp1404558-trusty/

Please report any testing back here.