It's good that 3.13.11.9 fixes the issue. That version will make it into Trusty through the normal stable update process. Can you also test the latest kernel in -proposed, which is -38? It currently has the 3.13.11.8 upstream kernel.
See https://wiki.ubuntu.com/Testing/EnableProposed for documentation how to enable and use -proposed.
It's good that 3.13.11.9 fixes the issue. That version will make it into Trusty through the normal stable update process. Can you also test the latest kernel in -proposed, which is -38? It currently has the 3.13.11.8 upstream kernel.
See https:/ /wiki.ubuntu. com/Testing/ EnableProposed for documentation how to enable and use -proposed.