How to add a background image to the GRUB menu in EFI on a DVD
Environment
- Red Hat Enterprise Linux (RHEL) 7, 8
Issue
How to add a background image to the GRUB
menu in EFI
on the RHEL
bootable DVD
Resolution
-
Copy all files from an original
DVD
to a custom iso:# mount -o loop RHEL-8.2.0-20200404.0-x86_64-dvd1.iso /media $ mkdir your_custom_iso $ cp -a /media/. your_custom_iso $ chmod u+w -R your_custom_iso $ mkdir your_custom_iso/EFI/BOOT/x86_64-efi/ $ rpm2cpio /media/BaseOS/Packages/grub2-efi-x64-modules-2.02-81.el8.noarch.rpm | cpio -idmv $ cp usr/lib/grub/x86_64-efi/{gfxterm{.mod,_background.mod},png.mod} your_custom_iso/EFI/BOOT/x86_64-efi/
-
Add a background image, works with
PNG
image with 640 x 480 dimensions:$ file your_custom_iso/EFI/BOOT/splash.png splash.png: PNG image data, 640 x 480, 8-bit/color RGBA, non-interlaced
-
Modify
your_custom_iso/EFI/BOOT/grub.cfg
:... insmod gfxterm terminal_output gfxterm loadfont /EFI/BOOT/fonts/unicode.pf2 insmod gfxterm_background insmod png background_image -m stretch /EFI/BOOT/splash.png ...
See also: How to change splash screen on grub menu during boot?
Disclaimer: Using custom ISO images is not supported; for example if anaconda fails when using a custom ISO image, Red Hat will not be able to help investigate the issue.
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