Public bug reported:

When running `linux-image-4.4.0-77-generic` on 16.04 LTS (as installed
via the `linux-virtual` package) on Hyper-V, the KVP daemon is unable to
start because the /dev/vmbus/hv_kvp device is missing.

Consequently, Hyper-V is unable to obtain networking information about
the VM (for example, IP addresses for vagrant, etc).

Both `syslog` and `ls` indicate that the file is missing:

root@dev-app:~# ls /dev/vmbus/ -l

total 0
crw------- 1 root root 10, 55 May  2 00:11 hv_fcopy
crw------- 1 root root 10, 54 May  2 00:11 hv_vss


LSB Release Info:

Description:    Ubuntu 16.04.2 LTS
Release:        16.04

** Affects: linux (Ubuntu)
     Importance: Undecided
         Status: Incomplete

** Attachment added: "Syslog"
   https://bugs.launchpad.net/bugs/1687631/+attachment/4870816/+files/syslog.txt

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https://bugs.launchpad.net/bugs/1687631

Title:
  On Hyper-V linux-image-4.4.0-77-generic does not create
  /dev/vmbus/hv_kvp

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