Comment 5 for bug 1597267

As per the description, I have tested this with 4.4.0-28-generic as well as mainline 4.6.3-040603-generic and 4.7.0-040700rc5-generic; they all hang in a similar fashion.

In fact, the journal output I attached was from the 4.7 kernel, I renamed the attachment accordingly: ubuntu16-04_linux4.7.0-040700rc5-generic_dp-hang.log