Article 5AM3K Can't boot from debian-live-10.6.0-amd64-xfce full install on multiusb

Can't boot from debian-live-10.6.0-amd64-xfce full install on multiusb

by
fredmyra
from LinuxQuestions.org on (#5AM3K)
I am used to making multiusbs to my friends and other people who ask me for help. I haver never used any softwaare, program or app I always install GRub to the MBR, or do a full install on some partition on the usb, then copy the iso files to the usb and then spend a heck of a lot of time re-editing my /etc/grub.d/40_custom.

And I have been happy with it for many years. Some time ago I installed Gentoo on 128 GB usb and then placed several isos on it. It worked after a long struggle with 40_custom, but the full Gentoo was too slow to make sense.
I then decided to replace Gentoo with something lighter and since then i have tried many full installs but have had problem with booting anything at all.

It might have to do with the fact that I moved my installation workplace from a Fujitsu desktop to a HP Laptop. BUt still I have done several installs from this Old ProBook4510s, with 2 GB ram, including multi-usbs.

Right now I am trying to install debian-live-10.6.0-amd64-xfce om the 128GB multi-usb. I have read at a debian page that a minimal install would be ideal for a base install - right now all I wanted from the full install on the multiusb is the ability to manage grub configuration as I add new isos. Everything else will be bonus.

I am using the same method i have used for many years:

I dd the iso to an usb and then proceed from it to full install on another usb.

My first trial, with net-install gave me a "/boot/grub/i386-pc/normal.mod could not be found" message.

Second trial with debian-live-10.6.0-amd64-xfce.iso on ful install with desktop, gave the same message.

Just for the sake of being sure I had a problem, I did a 3rd install from debian-live-10.6.0-amd64-xfce.iso without any desktop and got the same message again.

I have carefully verified the isos everytime.

Then I googed for 2 days without finding anything really interesting.

My ProBook has some Uefi capability but my Bios warns that it is only to be used for research, not for normal usage. I have it disabled.

My uefi Fujitsu laptop gives me a message of "no boot device" when I try to boot from the 128GB multi-usb without enabling CSM and the same "....normal.mod could not be found" when I do it with CSM enabled.

I am attaching a file with the contents of both "/boot" folders (dd-ed respectively full-installed) in hope that someone may help me identify the real problem) with contents of /boot folders in both the dd-ed iso and in the full install on the multi-usb in order

I think it is a silly question but I will risk it: must I found some MBR-specific iso????? I have been assuming that isohybrids have been standard for quite a while.
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