I'm not sure Phillip. I know that I have a UEFI BIOS on my ASUS K55N
notebook, and that when booting using BIOS mode (select a disk from the
list and boot the MBR) the regular linux and initrd commands work just
fine. That was how I was using Fedora 19 until two days ago. I switched
my disk from MBR to GPT and placed an EFI partition outside the LVM
prior to installing Ubuntu 13.10.
I encountered issues booting the ISO from the USB disk right off the
rip. When the USB/DVD boots through UEFI, which is the way the ASUS K55N
BIOS prefers to boot the USB/DVD, it launches GRUB instead of the
ISOLINUX/SYSLINUX boot loader. Any of the options I select will not boot
the Live ISO environment. It seems the ISO is broken.
So, curious as I am, checked the commands that GRUB uses to boot the
ISO. There were 3 problems that I found.
linux instead of linuxefi
invalid kernel path at /cdrom/preseed/ubuntu.seed, should be
/preseed/ubuntu.seed
initrd instead of initrdefi
So inside the ISO:/boot/grub.cfg, the transform is from:
menuentry "Try Ubuntu without installing" {
set gfxpayload=keep
linux /casper/vmlinuz.efi file=/cdrom/preseed/ubuntu.seed
boot=casper quiet splash --
initrd /casper/initrd.lz
}
to:ne
menuentry "Try Ubuntu without installing" {
set gfxpayload=keep
linuxefi /casper/vmlinuz.efi file=/preseed/ubuntu.seed
boot=casper quiet splash --
initrdefi /casper/initrd.lz
}
and so on for each of the entries.
Once inside the live environment, I was able to install Ubuntu 13.10
without any issues, using an LVM setup with seperate /home, /boot
(outside the LVM), and an EFI partition. Everything worked perfectly.
Reboot. Purple screen forever.
Forced the power off, grub noticed it didn't boot, and prompted me with
the menu. I inspected the command list and found similar issues. I
documented the changes I made in the original post, and I was able to
boot into the system just fine. I made the grub.cfg change and updated
the /etc/grub.d/10_linux script as well, and the system works flawlessly
now.
It may or may not be related to Secure Boot, but I do not have an option
to enable/disable Secure Boot with this BIOS. The initrdefi and linuxefi
commands apparently have no documentation, but they do exist and they do
permit my system to boot Ubuntu only when they are enabled.
I look forward to further input about the issue, but this is my
individual experience. Thanks again! If you need any more info, let me
know.
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https://bugs.launchpad.net/bugs/1245154
Title:
grub-efi grub.cfg generated with incorrect commands, linux and initrd,
instead of linuxefi and initrdefi
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