[Bug 1810070] Re: 18.04.1 Live CD fails to boot with EFI errors

[Steve Langasek]

> Laptop does not support UEFI

Then how and why is the firmware booting \efi\boot\bootx64.efi from this
CD?

This is certainly not a syslinux bug, syslinux only provides a BIOS
bootloader on these images and never attempts to chain to the EFI
bootloader.  Reassigning to shim; but if the laptop doesn't properly
support UEFI, then you should probably make sure the firmware isn't
trying to do a UEFI boot of the disk.

> Under Ubuntu 16.04, "sudo efibootmgr" reports that "EFI variables are
not supported on this system."

This doesn't actually tell us anything.  If Ubuntu was installed in BIOS
mode and the system is booted in BIOS mode, this is the result, even if
the firmware does support UEFI.

** Package changed: syslinux (Ubuntu) => shim (Ubuntu)

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https://bugs.launchpad.net/bugs/1810070

Title:
  18.04.1 Live CD fails to boot with EFI errors

Status in shim package in Ubuntu:
  New

Bug description:
  System Information:
  Fujitsu T901, 16GB Ram, i5-2520M CPU
  BIOS version: 1.15 (latest)
  (laptop manufactured 2011)
  Laptop does not support UEFI

  The MD5 sums were verified for the live cd image.

  The laptop is currently dual booted with Windows 10, Ubuntu 16.04 with
  separate hard drives.  The live cd (a live USB) was intended to be
  used to install 18.04.

  The error message at boot is:
  Could not get fio for li->DeviceHandle: Invalid Parameter
  Failed to find fs: Invalid Parameter
  Failed to load image \EFI\BOOT\grubx64.efi: Invalid Parameter
  start_image() returned Invalid Parameter

  The laptop was verified to be BIOS-only.  Under Windows 10,
  C:\Windows\Panther\setupact.log reports "Detected boot environment:
  BIOS".  Under Ubuntu 16.04, "sudo efibootmgr" reports that "EFI
  variables are not supported on this system."

  The system will successfully boot into a live cd environment using Knoppix 8.2, though it does report an error at boot time before proceeding with startup:
  ERROR
  Failed to start loader.efi: (14) Not Found

  Subsequent testing has found that the 16.04.5 live cd has the same
  issue, but the original 16.04 live cd will boot correctly after first
  displaying the same error message mentioned above, so the bug was
  introduced sometime during Xenial.

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