[Bug 2075579] [NEW] On Ubuntu Core 20+, grub shows /EndEntire when booting

[Robert Liu]

Public bug reported:

With the GRUB (2.06-2ubuntu14.2) of the latest pc gadget snap (rev. 145)
for UC20, it shows "/EndEntire" whenn booting. This behavior will clear
the boot logo. But GRUB (2.04-1ubuntu44.2) of pc gadget snap (rev. 132)
doesn't have this issue. A customer has splash screen requirement and is
ask for revert this change.

I did some quick checks and found that since 2.06-2ubuntu14, in the
patch (ubuntu-linuxefi.patch) doesn't remove
grub_efi_print_device_path() in make_file_path() of grub-
core/loader/efi/chainloader.c


ubuntu-linuxefi.patch in 2.04-1ubuntu44.2: https://git.launchpad.net/ubuntu/+source/grub2-unsigned/tree/debian/patches/ubuntu-linuxefi.patch?h=applied/2.04-1ubuntu44.2#n794

ubuntu-linuxefi.patch in 2.06-2ubuntu14:
https://git.launchpad.net/ubuntu/+source/grub2-unsigned/tree/debian/patches/ubuntu-
linuxefi.patch?h=applied/2.06-2ubuntu14#n609

** Affects: oem-priority
     Importance: Undecided
         Status: New

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

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https://bugs.launchpad.net/bugs/2075579

Title:
  On Ubuntu Core 20+, grub shows /EndEntire when booting

Status in OEM Priority Project:
  New
Status in grub2-unsigned package in Ubuntu:
  New

Bug description:
  With the GRUB (2.06-2ubuntu14.2) of the latest pc gadget snap (rev.
  145) for UC20, it shows "/EndEntire" whenn booting. This behavior will
  clear the boot logo. But GRUB (2.04-1ubuntu44.2) of pc gadget snap
  (rev. 132) doesn't have this issue. A customer has splash screen
  requirement and is ask for revert this change.

  I did some quick checks and found that since 2.06-2ubuntu14, in the
  patch (ubuntu-linuxefi.patch) doesn't remove
  grub_efi_print_device_path() in make_file_path() of grub-
  core/loader/efi/chainloader.c

  
  ubuntu-linuxefi.patch in 2.04-1ubuntu44.2: https://git.launchpad.net/ubuntu/+source/grub2-unsigned/tree/debian/patches/ubuntu-linuxefi.patch?h=applied/2.04-1ubuntu44.2#n794

  ubuntu-linuxefi.patch in 2.06-2ubuntu14:
  https://git.launchpad.net/ubuntu/+source/grub2-unsigned/tree/debian/patches/ubuntu-
  linuxefi.patch?h=applied/2.06-2ubuntu14#n609

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