How to chain u-boot with something that I don't understand.

[Ralf Mardorf]

On Sat, 2023-07-01 at 18:48 +0200, Mario Marietto wrote:
> Inside the directory "extlinux",there is the file called extlinux.conf
> What I want to know is which method he used to boot Ubuntu like this ?
> I don't see grub.cfg and I don't see u-boot.

Hi,

I've got know knowledge related to this u-bootstrap thingy, but I'm a
long time "syslinux" user who recently was forced to migrate to "grub".

"extlinux" is part of upstream's "syslinux". It's a bootloader. "grub"
is a bootloader too.

Related to the menu's "FDT" entry and "u-boot", you probably should join

the https://lists.zytor.com/syslinux

and

https://lists.denx.de/listinfo/u-boot mailing list.

I can't comment on the u-boot mailing list, but I'm subscribed to the
extlinux mailing list. If you post a request to this list, consider to
do your homework first and also consider to post only requests related
to this particular bootloader. The menu's "FDT" is new to me, it's
obviously a distinctive feature to that special thing you want to do,
that isn't related to Ubuntu:

"230626-01 - experimental debian bookworm image for aarch64/arm64
chromebooks based on the mediatek mt8186 soc (corsola) Latest

this is just an experimental testing image to be able to get started
with linux on this type of machines see [snip]
no gpu support and other things might not work as well [snip]
everything like that is done at your own risk and might break [snip]"
- https://github.com/hexdump0815/imagebuilder/releases

Regards,
Ralf