This bug is missing log files that will aid in diagnosing the problem.
>From a terminal window please run:

apport-collect 1687631

and then change the status of the bug to 'Confirmed'.

If, due to the nature of the issue you have encountered, you are unable
to run this command, please add a comment stating that fact and change
the bug status to 'Confirmed'.

This change has been made by an automated script, maintained by the
Ubuntu Kernel Team.

** Changed in: linux (Ubuntu)
       Status: New => Incomplete

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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

Status in linux package in Ubuntu:
  Incomplete

Bug description:
  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

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