[Bug 736743] Re: environment block not implemented on btrfs

[Luiz Angelo Daros de Luca]

Not really. The issue is still present on trusty.

If your /boot is a btrfs, grub2 does not know how to save its env.

In order to reproduce:

While on grub menu, press c
Type: save_env xxx

Disabling GRUB_SAVEDEFAULT just disables the feature that needs
save_env. It is not a fix.

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https://bugs.launchpad.net/bugs/736743

Title:
  environment block not implemented on btrfs

Status in grub:
  New
Status in grub2 package in Ubuntu:
  Incomplete

Bug description:
  Binary package hint: grub2

  I just installed natty alpha 3 on a samsung NC10 netbook. When booting, immediately after the grub screen I see the error message:
  'sparse file not allowed. 
  press any key to continue'
  after pressing any key the boot continues as normal.

  This is with btrfs on / and a separate ext4 partition for /home. I had
  created the btrfs partition manually (i.e. in a shell outside
  ubiquity) simply running mkfs.btrfs /dev/sda1 and it was not
  reformatted in ubiquity.

  ProblemType: Bug
  DistroRelease: Ubuntu 11.04
  Package: grub-pc 1.99~rc1-4ubuntu1
  ProcVersionSignature: Ubuntu 2.6.38-6.34-generic 2.6.38-rc7
  Uname: Linux 2.6.38-6-generic i686
  Architecture: i386
  Date: Thu Mar 17 11:14:52 2011
  EcryptfsInUse: Yes
  InstallationMedia: Ubuntu 11.04 "Natty Narwhal" - Alpha i386 (20110302)
  ProcEnviron:
   LANGUAGE=en_GB:en
   LANG=en_US.UTF-8
   LC_MESSAGES=en_GB.UTF-8
   SHELL=/bin/bash
  SourcePackage: grub2
  UpgradeStatus: No upgrade log present (probably fresh install)

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