[Bug 1851311] Re: Grub 2.04 Out of memory error, No server error

[tsger]

I rely on being able to boot iso files directly from an internal drive
(not using an external usb pen drive).  As others have mentioned, if I
generate the grub menu from within 19.10, (i.e. using grub 2.04), then
mounting iso files fails, and system hangs.  Currently I am using Arch
as my main system, and it uses grub 2.04, and it is able to boot from
iso files of various distros with no problem.

My conclusion would be that it is not a problem of the grub version, but
somehow a problem with this particular iteration of ubuntu (i.e. 19.10)

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https://bugs.launchpad.net/bugs/1851311

Title:
  Grub 2.04 Out of memory error, No server error

Status in grub2 package in Ubuntu:
  Confirmed

Bug description:
  Trying to loop mount ISO.

  Installed grub 2.04 to flash drive in UEFI mode from 19.10
  Flash drive does not boot and gives Out of memory error & no server error. Must load kernel first.

  Re-installed grub from 18.04 to same flash drive using same boot stanza.
  Booted without issue.

  From 18.04
  fred at Bionic-Z170N:~$ grub-install -V
  grub-install (GRUB) 2.02-2ubuntu8.13

  from 19.10
  fred at fred-Z170N-eoan:~$ grub-install -V
  grub-install (GRUB) 2.04-1ubuntu12

  Boot stanza that works in 2.02 but not in 2.04

  menuentry "Focal Live ISO" {
  set isofile="/ISO/focal-desktop-amd64.iso"
  loopback loop (hd0,1)$isofile
      linux (loop)/casper/vmlinuz boot=casper iso-scan/filename=$isofile toram noeject
      initrd (loop)/casper/initrd
  }

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