[Bug 1897416] [NEW] grub 2.04 could not boot from iso at UEFI native environment

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Dear everyone

I use ubuntu-20.04.1 at my UEFI CSM environment desktop PC.
grub 2.04 can boot from iso file.
and I use ubuntu-18.04.5 at my UEFI native environment note PC.
grub 2.02 can boot from iso file.

I check to boot from iso using ubuntu-20.04.1 liveCD usb at note PC.
I power on note PC, and selecting boot device to use UEFI boot manager.
then grub 2.04 boot menu displayed.

I change Boot from next volume to iso boot.
iso boot step as same as grub 2.02 definition.
but grub 2.04 could not boot from iso, display black screen.
I power off note PC.
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ProblemType: Bug
ApportVersion: 2.20.9-0ubuntu7.17
Architecture: amd64
AudioDevicesInUse:
 USER        PID ACCESS COMMAND
 /dev/snd/controlC0:  nakasima   1542 F.... pulseaudio
CurrentDesktop: ubuntu:GNOME
DistroRelease: Ubuntu 18.04
InstallationDate: Installed on 2020-05-29 (120 days ago)
InstallationMedia: Ubuntu 18.04.4 LTS "Bionic Beaver" - Release amd64 (20200203.1)
Lsusb:
 Bus 002 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub
 Bus 001 Device 004: ID 058f:5608 Alcor Micro Corp. 
 Bus 001 Device 003: ID 8087:0a2a Intel Corp. 
 Bus 001 Device 002: ID 0bda:0129 Realtek Semiconductor Corp. RTS5129 Card Reader Controller
 Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
MachineType: Jumper EZbook
Package: linux (not installed)
ProcFB: 0 i915drmfb
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-5.4.0-48-generic root=UUID=86097f4a-e2d9-4432-8006-816cf4c322c3 ro ipv6.disable=1 quiet
ProcVersionSignature: Ubuntu 5.4.0-48.52~18.04.1-generic 5.4.60
RelatedPackageVersions:
 linux-restricted-modules-5.4.0-48-generic N/A
 linux-backports-modules-5.4.0-48-generic  N/A
 linux-firmware                            1.173.19
Tags:  bionic
Uname: Linux 5.4.0-48-generic x86_64
UpgradeStatus: No upgrade log present (probably fresh install)
UserGroups: adm cdrom dip lpadmin plugdev sambashare sudo
_MarkForUpload: True
dmi.bios.date: 02/01/2018
dmi.bios.vendor: American Megatrends Inc.
dmi.bios.version: Jumper10x.P8.WP3132.NHNAUHL02
dmi.board.asset.tag: Default string
dmi.board.name: EZbook
dmi.board.vendor: Jumper
dmi.board.version: Default string
dmi.chassis.asset.tag: Default string
dmi.chassis.type: 10
dmi.chassis.vendor: Default string
dmi.chassis.version: Default string
dmi.modalias: dmi:bvnAmericanMegatrendsInc.:bvrJumper10x.P8.WP3132.NHNAUHL02:bd02/01/2018:svnJumper:pnEZbook:pvrDefaultstring:rvnJumper:rnEZbook:rvrDefaultstring:cvnDefaultstring:ct10:cvrDefaultstring:
dmi.product.family: Default string
dmi.product.name: EZbook
dmi.product.sku: Default string
dmi.product.version: Default string
dmi.sys.vendor: Jumper

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


** Tags: apport-collected bionic
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grub 2.04 could not boot from iso at UEFI native environment
https://bugs.launchpad.net/bugs/1897416
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