[Bug 814412] Re: Grub update renders system unbootable

[Lev Makhlis]

I now understand what happened. The installer creates (by default) an EFI install, with grub-efi-amd64. The automatic update replaces grub-efi with grub-pc, and the latter doesn't work. I manually reinstalled grub-efi and everything works now.
But something is clearly wrong: an automatic update shouldn't be breaking a clean install. So, what went wrong here? Is it a bug in the installer? in grub? in apt? Should I have done anything differently during installation?

** Changed in: grub2 (Ubuntu)
       Status: New => Invalid

** Converted to question:
   https://answers.launchpad.net/ubuntu/+source/grub2/+question/166162

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https://bugs.launchpad.net/bugs/814412

Title:
  Grub update renders system unbootable

Status in “grub2” package in Ubuntu:
  Invalid

Bug description:
  Did a clean install of Natty on a new 120G SSD. No dual boot, no
  custom partitions -- I let the installer partition it as it wants. The
  system installed and worked fine until the last grub update, at which
  point it became unbootable ("invalid arch independent ELF magic" +
  rescue shell). grub-install complains, "This GPT partition label has
  no BIOS Boot Partition; embedding won't be possible!"

  After unsuccessfully trying to fix the bootloader, I reinstalled the
  OS from scratch, again with no custom partitions. Again, the freshly
  installed system boots fine, but after the first automatic upgrade
  becomes unbootable.

  Attaching the output of boot_info_script.sh.

  ProblemType: Bug
  DistroRelease: Ubuntu 11.04
  Package: grub-pc 1.99~rc1-13ubuntu3
  ProcVersionSignature: Ubuntu 2.6.38-10.46-generic 2.6.38.7
  Uname: Linux 2.6.38-10-generic x86_64
  Architecture: amd64
  Date: Thu Jul 21 22:26:56 2011
  InstallationMedia: Ubuntu 11.04 "Natty Narwhal" - Release amd64 (20110427.1)
  ProcEnviron:
   LANGUAGE=en_US:en
   LANG=en_US.UTF-8
   SHELL=/bin/bash
  SourcePackage: grub2
  UpgradeStatus: Upgraded to natty on 2011-07-14 (8 days ago)

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