Same issue on 15 servers :/
When kernel 4.4.0-73.94 will be push on updates repository?

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  Kernel linux-image-4.4.0-67-generic prevent the boot on Microsoft
  Hyper-v 2012r2 Gen2 VM

Status in linux package in Ubuntu:
  Fix Released
Status in linux source package in Xenial:
  Fix Committed
Status in linux source package in Yakkety:
  Fix Committed
Status in linux source package in Zesty:
  Fix Released

Bug description:
  After updating the kernel inside the virtual machine to the version 
4.4.0-67-generic, at the next boot the vm will stuck in a black screen at every 
try. An hard reset is required.
  The only workaround is to set the default in grub to the previous version.
  The virtual machine hardware is a Gen2.
  We are experiencing this issue on all our vps with the same kernel (around 
300-400 vms).
   total 0
   crw-rw---- 1 root audio 116,  1 Mar 20 10:30 seq
   crw-rw---- 1 root audio 116, 33 Mar 20 10:30 timer
  AplayDevices: Error: [Errno 2] No such file or directory
  ApportVersion: 2.20.1-0ubuntu2.5
  Architecture: amd64
  ArecordDevices: Error: [Errno 2] No such file or directory
  AudioDevicesInUse: Error: command ['fuser', '-v', '/dev/snd/seq', 
'/dev/snd/timer'] failed with exit code 1:
  DistroRelease: Ubuntu 16.04
  HibernationDevice: RESUME=/dev/mapper/vg01--vg-swap_1
  InstallationDate: Installed on 2017-03-13 (7 days ago)
  IwConfig: Error: [Errno 2] No such file or directory
  Lsusb: Error: command ['lsusb'] failed with exit code 1:
  MachineType: Microsoft Corporation Virtual Machine
  Package: linux (not installed)
  ProcFB: 0 hyperv_fb
  ProcKernelCmdLine: BOOT_IMAGE=/vmlinuz-4.4.0-66-generic.efi.signed 
root=/dev/mapper/vg01--vg-root ro nomodeset
  ProcVersionSignature: Ubuntu 4.4.0-66.87-generic 4.4.44
   linux-restricted-modules-4.4.0-66-generic N/A
   linux-backports-modules-4.4.0-66-generic  N/A
   linux-firmware                            1.157.8
  RfKill: Error: [Errno 2] No such file or directory
  Tags:  xenial
  Uname: Linux 4.4.0-66-generic x86_64
  UpgradeStatus: No upgrade log present (probably fresh install)
  _MarkForUpload: True 11/26/2012
  dmi.bios.vendor: Microsoft Corporation
  dmi.bios.version: Hyper-V UEFI Release v1.0
  dmi.board.asset.tag: None Virtual Machine
  dmi.board.vendor: Microsoft Corporation
  dmi.board.version: Hyper-V UEFI Release v1.0
  dmi.chassis.asset.tag: 4898-1213-1192-4801-7611-1594-99
  dmi.chassis.type: 3
  dmi.chassis.vendor: Microsoft Corporation
  dmi.chassis.version: Hyper-V UEFI Release v1.0
dmi:bvnMicrosoftCorporation:bvrHyper-VUEFIReleasev1.0:bd11/26/2012:svnMicrosoftCorporation:pnVirtualMachine:pvrHyper-VUEFIReleasev1.0:rvnMicrosoftCorporation:rnVirtualMachine:rvrHyper-VUEFIReleasev1.0:cvnMicrosoftCorporation:ct3:cvrHyper-VUEFIReleasev1.0: Virtual Machine
  dmi.product.version: Hyper-V UEFI Release v1.0
  dmi.sys.vendor: Microsoft Corporation

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