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

Sébastien Bernard sbernard at nerim.net
Mon Sep 24 23:18:24 UTC 2012

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

Status in “grub2” package in Ubuntu:

Bug description:
  Reported by Oz by email.


  1) Take a GPT/UEFI pc with preinstalled OEM Windows :

  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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