I am trying to boot Arch Linux via an EFI Stub. I created an EFI partition (formatted as FAT32), a swap partition and a main partition on which I installed the Arch Linux core package group. I then used the efibootmgr to configure my motherboard to use the EFI partition to boot using the command as follows:
# efibootmgr --disk /dev/nvme0n1 --part 1 --create --label "mysystem" --loader /vmlinuz-linux --unicode 'root=PARTUUID=XXXXXXXX-XXXX-XXXX-XXXX-XXXXXXXXXXXX rw initrd=\initramfs-linux.img' --verbose
I know that this worked because the boot option "mysystem" is showing up in my motherboard's BIOS boot options and it lists the SSD involved so I know the PARTUUID I used is correct.
However, when I tell the machine to boot this way it pauses briefly and then fails (either going back to the BIOS setup or giving an error message depending on how it was initiated).
So, either the EFI partition is empty for some reason or the files there are not matching the settings in the efibootmgr instruction. But I do not know how to diagnose this further. How do I even find out the contents of the EFI partition in the first place?