[Bug 1063602] [NEW] 'loadfont unicode' fails in SB-signed EFI image; image and grub-install don't agree on path

[Steve Langasek]

Public bug reported:

The stock grub config does the following:

if [ x$feature_default_font_path = xy ] ; then
   font=unicode
else
  [...]
fi
if loadfont $font ; then
  [...]

'loadfont unicode' fails in the SecureBoot EFI image with this error:
  error: file `/EFI/ubuntu/fonts/unicode.pf2' not found.

>From what I can tell, this is because grubx64.efi (from debian/rules) is
built with -p /EFI/ubuntu, but grub-install copies the font to
/boot/grub/fonts (which of course is not on the EFI system partition).
In the non-SB image generated by grub-install, the prefix is set to
/boot/grub, so there's no problem; but for the SB image, we don't know
where /boot/grub will be.  Either grub.cfg has to be changed to search
for such files in the SB case, or the fonts (and locales) need to be
installed to /efi/ubuntu and not just to /boot/grub.

** Affects: grub2 (Ubuntu)
     Importance: Undecided
         Status: New

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https://bugs.launchpad.net/bugs/1063602

Title:
  'loadfont unicode' fails in SB-signed EFI image; image and grub-
  install don't agree on path

Status in “grub2” package in Ubuntu:
  New

Bug description:
  The stock grub config does the following:

  if [ x$feature_default_font_path = xy ] ; then
     font=unicode
  else
    [...]
  fi
  if loadfont $font ; then
    [...]

  'loadfont unicode' fails in the SecureBoot EFI image with this error:
    error: file `/EFI/ubuntu/fonts/unicode.pf2' not found.

  From what I can tell, this is because grubx64.efi (from debian/rules)
  is built with -p /EFI/ubuntu, but grub-install copies the font to
  /boot/grub/fonts (which of course is not on the EFI system partition).
  In the non-SB image generated by grub-install, the prefix is set to
  /boot/grub, so there's no problem; but for the SB image, we don't know
  where /boot/grub will be.  Either grub.cfg has to be changed to search
  for such files in the SB case, or the fonts (and locales) need to be
  installed to /efi/ubuntu and not just to /boot/grub.

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