[Bug 1090829] Re: grub-efi cannot install on locked ESP (Input/output error)

[YannUbuntu]

a 3rd case: http://ubuntuforums.org/showthread.php?p=12391963

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https://bugs.launchpad.net/bugs/1090829

Title:
  grub-efi cannot install on locked ESP (Input/output error)

Status in “grub2” package in Ubuntu:
  New

Bug description:
  HP G6 laptop with Windows 8 installed, and looking to have a dual-boot
  with Ubuntu 12.10

  With SecureBoot enabled: http://paste.ubuntu.com/1421098
  And with SecureBoot disabled: http://paste.ubuntu.com/1421155

  grub-efi fails writing on the original ESP:

  mkdir: cannot create directory `/boot/efi/EFI/ubuntu': Input/output error
  grub-install --efi-directory=/boot/efi --target=x86_64-efi --uefi-secure-boot : exit code of grub-install :1

  **************** WORKAROUND:
  1) via Gparted create another EFI partition (FAT32, 200MB, located in the first 100GB of the disk), move the 'boot' flag on it
  2) make Ubuntu use this new ESP (eg via Boot-Repair).

  Example: http://paste.ubuntu.com/1442264

  *************** Computers that come with a locked ESP:
  - HP G6 laptop: see original bug description
  - Samsung Series 9 NP900X4C-A07US: http://paste.ubuntu.com/1442902

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