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

[Sébastien Bernard]

Try this command to install the grub :
grub-install --efi-directory=/boot/efi/ --target=x86_64-efi --recheck --debug
Where /boot/efi is the directory where the EFI partition (/dev/sda1) is mounted.
I was able to regenerate a grub install with it.
Then run grub by hand in the efi shell.

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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:
  New

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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