[Bug 851166] Re: package grub-efi-amd64 installation fails with "Auto-detection of a filesystem of /dev/... failed"

[Peter Hawkins]

GNU Parted 2.3
I don't think this is the same issue as #820723; I've successfully performed grub upgrades several times, but a recent grub package started producing this behavior. My system still boots at the moment; the package simply will not upgrade.

Here's my partition scheme (which I created manually, not using the installer directly)
/dev/sda1 is my UEFI EPS partition. I created the partitions manually during installation to work around the issues in #769669 (partman creates an illegal FAT16 EPS partition).
/dev/sda2 is my btrfs root partition.

$ sudo parted /dev/sda
Using /dev/sda
Welcome to GNU Parted! Type 'help' to view a list of commands.
(parted) print                                                            
Model: ATA M4-CT128M4SSD2 (scsi)
Disk /dev/sda: 128GB
Sector size (logical/physical): 512B/512B
Partition Table: gpt

Number  Start   End     Size    File system     Name                          Flags
 1      17.4kB  200MB   200MB   fat32                                         boot
 2      200MB   64.2GB  64.0GB  btrfs
 3      64.2GB  72.4GB  8192MB  linux-swap(v1)
 4      72.4GB  72.5GB  134MB                   Microsoft reserved partition  msftres
 5      72.5GB  128GB   55.5GB  ntfs            Basic data partition

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https://bugs.launchpad.net/bugs/851166

Title:
  package grub-efi-amd64 installation fails with "Auto-detection of a
  filesystem of /dev/...  failed"

Status in “grub2” package in Ubuntu:
  New

Bug description:
  The grub package appears to have difficulty updating my already
  working grub installation. My machine uses UEFI to boot; the root
  filesystem (/dev/sda2) is in BTRFS format.

  ProblemType: Package
  DistroRelease: Ubuntu 11.10
  Package: grub-efi-amd64 1.99-12ubuntu3
  ProcVersionSignature: Ubuntu 3.0.0-11.18-generic 3.0.4
  Uname: Linux 3.0.0-11-generic x86_64
  NonfreeKernelModules: openafs nvidia
  ApportVersion: 1.23-0ubuntu1
  Architecture: amd64
  Date: Thu Sep 15 11:28:42 2011
  ErrorMessage: subprocess installed post-installation script returned error exit status 1
  InstallationMedia: Ubuntu 11.04 "Natty Narwhal" - Release amd64 (20110427.1)
  SourcePackage: grub2
  Title: package grub-efi-amd64 1.99-12ubuntu3 failed to install/upgrade: subprocess installed post-installation script returned error exit status 1
  UpgradeStatus: No upgrade log present (probably fresh install)

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