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

[C.S.Cameron]

Simple ISO Booter using mkusb.

https://askubuntu.com/questions/1075755/create-bootable-ubuntu-usb-on-a
-partition-instead-of-overwriting-the-entire-usb/1080749#1080749

When setting up mkusb select "usb-pack-efi" per post #18 above. It
should insure the use of grub 2.02.

More Complex ISO Booter using mkusb

If you wish to add up to 8GB of persistence to each ISO using casper-rw
and home-rw files with persistent-path see:

https://askubuntu.com/questions/1183191/handmade-live-usb-
multisystem/1184111

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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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