[bug #50749] Boot fails due to EFI grub.cfg missing braces around root partition e.g. hd0, gpt4

[Derek Macias]

URL:
  <http://savannah.gnu.org/bugs/?50749>

                 Summary: Boot fails due to EFI grub.cfg missing braces around
root partition e.g. hd0,gpt4
                 Project: GNU GRUB
            Submitted by: dmacias
            Submitted on: Fri 07 Apr 2017 02:38:27 PM UTC
                Category: Booting
                Severity: Major
                Priority: 5 - Normal
              Item Group: None
                  Status: None
                 Privacy: Public
             Assigned to: None
         Originator Name: Derek Macias
        Originator Email: address@hidden
             Open/Closed: Open
         Discussion Lock: Any
                 Release: 
                 Release: 2.02~beta1
         Reproducibility: Every Time
         Planned Release: None

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Details:

I created a UEFI usb boot disk of Linux Mint 18.1 Cinnamon x64. Installation
is on a 256GB internal SSD (/dev/sda). I have /dev/sda1 which is 100 MiB EFI
system partition with mount point at /boot/efi formatted to fat32 and
/dev/sda4 is root formatted to xfs. Install went fine except that on reboot I
get the grub console. I tracked down the problem to grub-efi-amd64 or
grub-efi-amd64-signed created a /boot/efi/EFI/ubuntu/grub.cfg with missing ()
arround the root partition which is the reason for the failed boot. Here is
the line created in grub.cfg:

search.fs_uuid 6ef44b4a-5164-4f1d-83b2-1cc82720dde0 root hd0,gpt4

should be:sudo apt install --reinstall grub-efi-amd64-signed or
sudo apt install --reinstall grub-efi-amd64



search.fs_uuid 6ef44b4a-5164-4f1d-83b2-1cc82720dde0 root (hd0,gpt4)

This can be recreated by deleting the /boot/efi/EFI/ubuntu/grub.cfg and
running

sudo apt install --reinstall grub-efi-amd64-signed or
sudo apt install --reinstall grub-efi-amd64ed the package 

4/5/17) I upgraded (2.02~beta2-36ubuntu3.8) to 2.02~beta2-36ubuntu3.9. The
same result. No braces around root partition.




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