[Bug 1272664] Re: Installing UEFI boot entry on Hyper-V gen 2 corrupts VM configuration, making the VM unuseable

[Jan Henke]

I tried again with the daily build ISO from today (March 1st) and can confirm it is really the boot entry, which is corrupting the configuration file.
Once the boot entry was created by the installer, the configuration was no longer readable by Hyper-V, removing hte ubuntu entry from UEFi with efibootmgr restored the configuration files again.

So we must find out how the UEFI boot entry can be created without
breaking Hyper-V.

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https://bugs.launchpad.net/bugs/1272664

Title:
  Installing UEFI boot entry on Hyper-V gen 2 corrupts VM configuration,
  making the VM unuseable

Status in “efibootmgr” package in Ubuntu:
  Confirmed

Bug description:
  Installing Ubuntu on a generation 2 Hyper-V VM corrupts the
  configuration of said VM, so the VM cannot be loaded by the VM manager
  any more and the VMs settings are no longer accessable.

  I narrowed the cause of the bug down to the creation of the boot
  loader entry in the VMs UEFI.

  Steps to repoduce:
  * Create a new generation 2 VM in Hyper-V
  * Use a Alpha 2 (or newer) image of 14.04 to install (X-)Ubuntu (Kernel 3.13 or newer is required for the generation 2)
  * After the successful installation try to access the VMs settings menu -> No longer accessaible, Hyper-V returns an error
  * Check the Hyper-V Manager -> The corrupted VM is no longer in the list of VMs.

  Additional it can be confirmed afterwards by doing:
  * Create a new generation 2 VM using the same virtual hard drive file (*.vhdx) used before.
  * Boot into the live session.
  * Create the UEFI boot entry again
  -> VM is again corrupted and shows the same symptoms as above.

  This bug breaks Ubuntu on Hyper-V generation 2. That is a serious
  issue, as the generation 2 offers a lot of improvements over the
  generation 1.

  ProblemType: Bug
  DistroRelease: Ubuntu 14.04
  Package: grub-efi-amd64-signed 1.27+2.00-22
  ProcVersionSignature: Ubuntu 3.13.0-5.20-generic 3.13.0
  Uname: Linux 3.13.0-5-generic x86_64
  ApportVersion: 2.13.1-0ubuntu1
  Architecture: amd64
  CasperVersion: 1.336ubuntu1
  Date: Sat Jan 25 12:25:12 2014
  LiveMediaBuild: Xubuntu 14.04 LTS "Trusty Tahr" - Alpha amd64 (20140121.1)
  ProcEnviron:
   LANGUAGE=en_US
   TERM=xterm
   PATH=(custom, no user)
   LANG=en_US.UTF-8
   SHELL=/bin/bash
  SourcePackage: grub2-signed
  UpgradeStatus: No upgrade log present (probably fresh install)

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