[Bug 1173457] Re: Ubuntu Installer uses wrong bootloader location for USB UEFI installs

[Maria P]

*** This bug is a duplicate of bug 1396379 ***
    https://bugs.launchpad.net/bugs/1396379

Happy 10 year anniversary to this bug!

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https://bugs.launchpad.net/bugs/1173457

Title:
  Ubuntu  Installer uses wrong bootloader location for USB UEFI installs

Status in ubiquity package in Ubuntu:
  Triaged

Bug description:
  On a secure boot pc (secure boot enabled, Ubuntu Desktop 12.10 64bit installed with Win 8), installing from live media Ubuntu 13.04 64 bit desktop to a target thumbdrive (pre partitioned with gpt, and a bootable FAT32 partition 1 of 250M labeled EFI) properly identifies the target's first partition as an "EFI bootable partition" (when "do something else" is selected), but the install
  will then mount the ESP off the laptop's hard drive (at /target/boot/efi).  
  The install creates a grub.cfg file under /target/boot/efi/EFI/ubuntu pointing to the target's(uuid) /boot/grub/grub.cfg.  This wrong grub.cfg will prevent the laptop from booting Ubuntu without the thumbdrive, throwing the boot into a grub  prompt (since the configfile points to the usb and is no longer present).

  The install should use the identified "EFI boot partition" on the
  target, so the target may boot when first in boot priority, and not
  touch the hard disk's EFI files.  If for any reason a permanent
  installation is to be made to a USB device, simply select the hard
  disk's ESP instead of one on the target.

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