[Bug 1052840] Re: [regression] No access to Ubuntu after installing 12.10 on UEFI system

[YannUbuntu]

Thanks Sébastien, your command works on 12.10 (but not on 12.04).

So the problem is that the command is not the same on 12.04 and 12.10:
* 12.04 needs 'grub-install'
* 12.10 needs 'grub-install --efi-directory=/boot/efi/ --target=x86_64-efi'

It would be nice if the same command could be used for both 12.04 and
12.10.

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https://bugs.launchpad.net/bugs/1052840

Title:
  [regression] No access to Ubuntu after installing 12.10 on UEFI system

Status in “grub2” package in Ubuntu:
  Confirmed

Bug description:
  Reported by Oz by email.

  HOWTO REPRODUCE:

  1) Take a GPT/UEFI pc with preinstalled OEM Windows :
  http://paste.ubuntu.com/1214026

  2) Install Quantal in dualboot, and reboot

  3) The PC directly boots to Windows. No GRUB have been installed. No
  GRUB entry in the UEFI firmware. And no grubx64.efi file created in
  the ESP.

  4) Reinstalling grub-efi fails: http://paste.ubuntu.com/1214035
  (error: grub-install  : source_dir doesn't exist. Please specify --target or --directory )

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