Ubuntu 18.04 Desktop UEFI OS Install options in Grub.cfg

[arun]

We are facing issue installing Ubuntu 18.04 Desktop, but if we change linux to linuxefi and initrd to initrdefi, it works.

We wanted to make that change permanently in ISO/USB file.

We cannot mount the /dev/sdb1 rw, and make the changes.

So every boot, we have to edit.

Can you please help us, how we can get around this, and make this change permanent in the grub.cfg file

[Joseph Salisbury (jsalisbury)]

Did this issue just start happening with 18.04? Do you happen to know if prior releases were similar?

[arun (idcpreview)]

Issue is not specific to 18.04, but what I can say is:
Until now, we were installing EFI method with this linux/initrd options. But now we need to test with pure EFI option, so we are forced to use linuxefi and initrdefi.

We are ok with one of the following options.

1. how to change permanently in grub.cfg the linux to linuxefi and initrd to initrdefi
2. Two options in OS install, one as linux/initrd and another option as linuxefi/initrdefi, so that we do not have to change everytime we install the OS.

[Joseph Salisbury (jsalisbury)]

This may not be a bug. The GRUB UEFI implementation does not rely on the initrdefi and linuxefi names for a UEFI boot, this is integrated into the linux and initrd commands specifically so that we can use a grub.cfg which is boot-protocol-agnostic.

Could you detail why you need this in order to get your kernel booting with EFI, that may surface a bug elsewhere.

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