14.04 on Macbook Pro always boots to GRUB prompt

Question

I have a fresh installation of Ubuntu 14.04 on a Macbook Pro. I've also already tried reinstallting that Ubuntu another time. It's a single-boot system, i.e. I have no other operating systems installed.

Each time I start it, it boots to the GRUB prompt. Here all I have to do is to load the correct config:

configfile (hd2,gpt1)/EFI/grub/grub.cfg

This command starts the system without any further problems. How can I make GRUB start from this config automatically, i.e. without booting to prompt? I've already tried running update-grub and grub-install /dev/sda. They finish without errors, but don't make any change.

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Here is some further information, in case its relevant:

• mount | grep boot

  /dev/sda1 on /boot/efi type vfat (rw)
  

• sudo parted -l

  Model: ATA Hitachi HTS54503 (scsi)
  Disk /dev/sda: 320GB
  Sector size (logical/physical): 512B/512B
  Partition Table: gpt
  
  Number  Start   End    Size    File system     Name  Flags
   1      1049kB  538MB  537MB   fat32                 boot
   2      538MB   316GB  315GB   ext4
   3      316GB   320GB  4150MB  linux-swap(v1)
  

• sudo efibootmgr

  BootCurrent: 0000
  Timeout: 5 seconds
  BootOrder: 0000
  Boot0000* grub
  Boot0080* 
  Boot0081* Mac OS X
  Boot0082* 
  BootFFFF*
  

Answer 1

After hours of headache, I stumbled over this forum post. Interestingly, the situation explained their is quite contrary to mine:

The problem is at least partially fixed. When dumped to the grub shell the "set" command is useful. It clearly showed the prefix as being set to "(hd0,gpt1)/boot/grub". This folder and the stub grub.cfg did not exist and instead the stub grub.cfg was in the /EFI/ubuntu folder in the EFI partition instead. I manually created /boot/grub/ in the EFI partition and copied the stub grub.cfg into it and that was all she took.

For me however, the prefix was .../efi/ubuntu but it should be efu/grub. To me, it really looks like this is an Ubuntu bug. The proper fix for this issue would be to change the prefix, but I also have no idea where it is coming form. TL;DR: So instead, as a work-around, I copied /boot/efi/EFI/grub to /boot/efi/EFI/ubuntu and voilà.