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[Ben Howard <ben.howard@xxxxxxxxxxxxx>]

To highlight jleung's comments, what is going on is that generation 2
VM's require UEFI to boot, inform the UEFI boot manager of the OS (via
registration of values in the NVRAM). The Ubuntu installer does this at
installation time. What jlaeung's describing is converting to "removal"
mode.

I suspect that VM's should be installed w/ removal mode by default to
support cloning operations. We currently do this on the Ubuntu 14.04 LTS
UEFI cloud images.

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https://bugs.launchpad.net/bugs/1317695

Title:
  hyper-v: Unable to copy and boot Generation 2 Ubuntu 14.04 VHDs

Status in “linux” package in Ubuntu:
  Confirmed

Bug description:
  After creating a Generation 2 virtual machine, we are unable to
  shutdown the VM, copy the VHD and create a new Generation 2 virtual
  machine out of the VHD. It seems that once the copy out operation has
  occurred, the UEFI boot entry is not available on the file-system.
  This hinders scenarios where customers routinely copy VHDs to create
  new virtual machines. Root cause unknown as of now.

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