UEFI boot fails...

[Jacques Beigbeder]

jacques> When booting a Dell computer, I get the prompt:
jacques> grub>
jacques>
jacques> Just typing: source /efi/NAME/grub.cfg
jacques> make my computer boots.

liam> I do not know much about UEFI booting -- just enough to dislike it. I
liam> find it complicated to get working correctly, and fragile when it
liam> does.

I agree, but modern PC don't have legacy any more.

>> * if the disk is partitioned with GPT, do you have a BIOS_GRUB partition?
>> * if you have more than 1 disk, does only 1 have an ESP?
>> * is your ESP being mounted under /boot/efi so that Linux can find it
>> when updating the bootloader?

Parted says:
  Disk /dev/nvme0n1: 1024GB
  Partition Table: gpt
   1      1049kB  1075MB  1074MB  fat16                 boot, esp
and df says:
  /dev/nvme0n1p1          1048288     5456   1042832   1% /boot/efi

Files are:
	# find /boot/efi -type f
	/boot/efi/EFI/aaa/grubx64.efi
	/boot/efi/EFI/aaa/shimx64.efi
	/boot/efi/EFI/aaa/mmx64.efi
	/boot/efi/EFI/aaa/BOOTX64.CSV
	/boot/efi/EFI/aaa/grub.cfg		<<< it works with source!
	/boot/efi/EFI/BOOT/BOOTX64.EFI
	/boot/efi/EFI/BOOT/fbx64.efi
	/boot/efi/EFI/BOOT/mmx64.efi

I have another disk:
  Disk /dev/sda: 1024GB
  ...
   1      1049kB  1075MB  1074MB

So???

Best,

   --Jacques Beigbeder