[Bug 1478848] Re: Grub efi does not execute /efi/boot/grub.cfg and goes in shell mode

[Nicolas Gama]

More information:
it seems that the prefix is wrongly set when normal.mod is loaded:

echo $root  shows (hd0,gpt1)
echo $prefix shows (hd0,gpt1)/boot/grub

On my system, (hd0,gpt1) is the EFI System partition and the linux root
is (hd0,gpt3)

This means that normal.mod is looking for (hd0,gpt1)/boot/grub/grub.cfg
instead of (hd0,gpt1)/efi/boot/grub.cfg

I guess that the right prefix should be (hd0,gpt1)/efi/boot ?
Is it grub-mkimage or grub-install who does this mistake? 

In any cases, copying /efi/boot/grub.cfg to /boot/grub/grub.cfg inside
the EFI partition is a dirty workaround, but it will works until a fix
is committed.

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https://bugs.launchpad.net/bugs/1478848

Title:
  Grub efi does not execute /efi/boot/grub.cfg and goes in shell mode

Status in grub2 package in Ubuntu:
  New

Bug description:
  After installing Ubuntu 15.04 in efi mode, grub efi amd64 does not boot properly:
  when the computer boots, it goes directly into grub shell mode, 
  it does not execute the grub.cfg configuration file in the efi partition (either /efi/boot/grub.cfg  or /efi/ubuntu/grub.cfg, depending on whereas the --removable option was provided or not).

  from the grub shell, executing the following command resumes normal boot operations.
  configfile /efi/boot/grub.cfg
  or
  configfile /efi/ubuntu/grub.cfg

  
  Reproduce this bug:

  install grub with:
  the alternate cd (regular ubuntu installation)
  or 
  grub-install --target x86_64-efi --efi-directory ... --root-directory ... 
  or 
  grub-install --target x86_64-efi --efi-directory ... --root-directory ... --removable

  and try to reboot.

  ProblemType: Bug
  DistroRelease: Ubuntu 15.04
  Package: grub-efi-amd64 2.02~beta2-22ubuntu1.1
  ProcVersionSignature: Ubuntu 3.19.0-18.18-generic 3.19.6
  Uname: Linux 3.19.0-18-generic x86_64
  ApportVersion: 2.17.2-0ubuntu1.1
  Architecture: amd64
  CurrentDesktop: LXDE
  Date: Tue Jul 28 10:51:54 2015
  SourcePackage: grub2
  UpgradeStatus: No upgrade log present (probably fresh install)

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