[Bug 1308758] Re: Ubuntu 14.04 install blocks Windows 8.1 from booting in dual boot

[Shaform]

Since you cannot boot windows 8.1 from BIOS, you may have a different
problem.

However, I do notice that many people are unable to dual boot window 8.1
and Ubuntu in UEFI Secure Boot mode:
http://ubuntuforums.org/showthread.php?t=2187907

I have this same problem, I cannot boot Windows 8.1 from grub, but I can
boot it from BIOS menu.

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https://bugs.launchpad.net/bugs/1308758

Title:
  Ubuntu 14.04 install blocks Windows 8.1 from booting in dual boot

Status in “grub2” package in Ubuntu:
  New

Bug description:
  My computer is 5 months old. Was dual booting Windows 8.1 and Ubuntu
  13.10. No issues. Did a clean install of 14.04 final beta to the
  partition which had 13.10. Upon restart, I can only boot to Ubuntu. If
  I try windows from grub menu, it reverts right back to Ubuntu. If I
  try windows from a bios selection before loading grub, as soon as I
  select windows, grub appears, and will only load Ubuntu. Ubuntu is
  installed in efi mode. Ubuntu and windows both are in the efi
  partition. I ran the boot-utility for saucy since I didn't find one
  for 14.10. It did not fix the problem. As of now, I'm locked out of
  Windows 8.1. Another person had the exactly the same thing happen both
  on the first install with 13.10 where Ubuntu would not boot, and now
  on the upgrade to 14.04 where windows 8.1 will not boot. See
  http://askubuntu.com/questions/447568/windows-8-entry-in-grub-not-
  working

  Version: Description:	Ubuntu Trusty Tahr (development branch)
  Release:	14.04

  Grub 2.02~beta2-8 -  All check boxes in synaptic for grub are grayed
  with an ! point in.

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