Thanks for the update.  That means we should start testing prior to 4.4.
Can you test 3.16 final:

http://kernel.ubuntu.com/~kernel-ppa/mainline/v3.16-utopic/

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https://bugs.launchpad.net/bugs/1649326

Title:
  EFI stub loader broken in kernel 3.13.0-101-generic (& later in 3.13
  series)

Status in linux package in Ubuntu:
  Confirmed
Status in linux source package in Trusty:
  Confirmed

Bug description:
  The EFI stub loader produces consistent boot errors when booting
  Trusty starting with version 3.13.0-101-generic. This bug can be
  reproduced in many ways (using efibootmgr, an EFI shell, rEFInd,
  etc.). One approach is:

  1) Install an EFI shell on the computer and set it as the default boot
     option using efibootmgr.
  2) Copy the kernel and initrd files from /boot to /boot/efi.
  3) Rename the kernel file to use a .efi filename extension.
  4) Reboot into the EFI shell.
  5) Try to launch the kernel with a command like:
     fs0:\vmlinuz-3.13.0-104-generic.efi ro root=/dev/sda2 
initrd=\initrd.img-3.13.0-104-generic

  The result will be a hung or crashed system. (In VirtualBox, in which
  I've tested this, the VM produces a "guru meditation" and the session
  terminates.)

  I myself have tested only with the 3.13.0-104 kernel; however, reports
  from others indicate that the problem began with the 3.13.0-101
  kernel. See this Kubuntu forum thread for details:

  https://www.kubuntuforums.net/showthread.php?71204-Cannot-load-latest-
  kernels

  Note that early on, this thread focuses on rEFInd; however, the bug
  can be reproduced with other boot managers, including the EFI shell,
  as described in the preceding procedure, so I do not believe this is a
  rEFInd bug. rEFInd relies on the EFI stub loader to boot a Linux
  kernel, and I believe it's this component that's failing. The problem
  does NOT occur when using GRUB to launch the kernel. (GRUB does not
  rely on the EFI stub loader.)

  I have NOT encountered the problem with Xenial and its 4.4.0-series kernels 
(last tested: 4.4.0-53-generic) or Yakkety and its 4.8.0-series kernels (last 
tested: 4.8.0-30-generic). I have not yet tested Trusty with kernels from 
series beyond 3.13.0.
  --- 
  ApportVersion: 2.14.1-0ubuntu3.21
  Architecture: amd64
  AudioDevicesInUse:
   USER        PID ACCESS COMMAND
   /dev/snd/controlC0:  rodsmith   1675 F.... pulseaudio
  CurrentDesktop: LXDE
  DistroRelease: Ubuntu 14.04
  HibernationDevice: RESUME=UUID=561add6d-844e-4428-8378-d92bb112d0fc
  InstallationDate: Installed on 2014-04-27 (960 days ago)
  InstallationMedia: Ubuntu 14.04 LTS "Trusty Tahr" - Release amd64 (20140417)
  IwConfig:
   eth0      no wireless extensions.
   
   lo        no wireless extensions.
  Lsusb:
   Bus 001 Device 002: ID 80ee:0021 VirtualBox USB Tablet
   Bus 001 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
  MachineType: innotek GmbH VirtualBox
  Package: linux (not installed)
  ProcFB: 0 EFI VGA
  ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.13.0-106-generic 
root=UUID=78ff568b-2c22-4b31-9e0c-72703dca4460 ro quiet splash vt.handoff=7
  ProcVersionSignature: Ubuntu 3.13.0-106.153-generic 3.13.11-ckt39
  RelatedPackageVersions:
   linux-restricted-modules-3.13.0-106-generic N/A
   linux-backports-modules-3.13.0-106-generic  N/A
   linux-firmware                              1.127.22
  RfKill:
   
  Tags:  trusty
  Uname: Linux 3.13.0-106-generic x86_64
  UpgradeStatus: No upgrade log present (probably fresh install)
  UserGroups: adm cdrom dip lpadmin plugdev sambashare sudo
  _MarkForUpload: True
  dmi.bios.date: 12/01/2006
  dmi.bios.vendor: innotek GmbH
  dmi.bios.version: VirtualBox
  dmi.board.name: VirtualBox
  dmi.board.vendor: Oracle Corporation
  dmi.board.version: 1.2
  dmi.chassis.type: 1
  dmi.chassis.vendor: Oracle Corporation
  dmi.modalias: 
dmi:bvninnotekGmbH:bvrVirtualBox:bd12/01/2006:svninnotekGmbH:pnVirtualBox:pvr1.2:rvnOracleCorporation:rnVirtualBox:rvr1.2:cvnOracleCorporation:ct1:cvr:
  dmi.product.name: VirtualBox
  dmi.product.version: 1.2
  dmi.sys.vendor: innotek GmbH

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