I got same issue on Lenovo SR665 server for MAAS 2.8.2 when deploy Ubuntu 20.04. The server UEFI secure boot was disabled.
I didn't find it do the try to boot/load BOOTX64.EFI from ipmiconsole output and if 'cp ubuntu/* BOOT', then above error would disappear.
Below is efi partions and theirs files which deployment by MAAS. /boot/efi/ /boot/efi/EFI /boot/efi/EFI/ubuntu /boot/efi/EFI/ubuntu/grubx64.efi /boot/efi/EFI/ubuntu/shimx64.efi /boot/efi/EFI/ubuntu/mmx64.efi /boot/efi/EFI/ubuntu/BOOTX64.CSV /boot/efi/EFI/ubuntu/grub.cfg /boot/efi/EFI/BOOT /boot/efi/EFI/BOOT/BOOTX64.EFI /boot/efi/EFI/BOOT/fbx64.efi
I got same issue on Lenovo SR665 server for MAAS 2.8.2 when deploy Ubuntu 20.04. The server UEFI secure boot was disabled.
I didn't find it do the try to boot/load BOOTX64.EFI from ipmiconsole output and if 'cp ubuntu/* BOOT', then above error would disappear.
Below is efi partions and theirs files which deployment by MAAS. EFI/ubuntu EFI/ubuntu/ grubx64. efi EFI/ubuntu/ shimx64. efi EFI/ubuntu/ mmx64.efi EFI/ubuntu/ BOOTX64. CSV EFI/ubuntu/ grub.cfg EFI/BOOT/ BOOTX64. EFI EFI/BOOT/ fbx64.efi
/boot/efi/
/boot/efi/EFI
/boot/efi/
/boot/efi/
/boot/efi/
/boot/efi/
/boot/efi/
/boot/efi/
/boot/efi/EFI/BOOT
/boot/efi/
/boot/efi/