[Bug 1475030] [NEW] allow update-grub to recognize filesystems on btrfs subvolumes

[Karl-Philipp Richter]

Public bug reported:

If `grub2` supports booting from different btrfs subvolumes with
`rootflags`, this support should be exploited to allow booting from them
from the `grub` menu.

ProblemType: Bug
DistroRelease: Ubuntu 15.04
Package: grub2 (not installed)
Uname: Linux 4.1.1-040101-generic x86_64
NonfreeKernelModules: nvidia
ApportVersion: 2.17.2-0ubuntu1.1
Architecture: amd64
CurrentDesktop: Unity
Date: Wed Jul 15 23:17:44 2015
InstallationDate: Installed on 2015-06-08 (37 days ago)
InstallationMedia: Ubuntu 14.04 LTS "Trusty Tahr" - Release amd64 (20140417)
ProcEnviron:
 TERM=xterm
 PATH=(custom, no user)
 XDG_RUNTIME_DIR=<set>
 LANG=de_DE.UTF-8
 SHELL=/bin/bash
SourcePackage: grub2
UpgradeStatus: Upgraded to vivid on 2015-06-09 (36 days ago)

** Affects: grub2 (Ubuntu)
     Importance: Undecided
         Status: New


** Tags: amd64 apport-bug vivid

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https://bugs.launchpad.net/bugs/1475030

Title:
  allow update-grub to recognize filesystems on btrfs subvolumes

Status in grub2 package in Ubuntu:
  New

Bug description:
  If `grub2` supports booting from different btrfs subvolumes with
  `rootflags`, this support should be exploited to allow booting from
  them from the `grub` menu.

  ProblemType: Bug
  DistroRelease: Ubuntu 15.04
  Package: grub2 (not installed)
  Uname: Linux 4.1.1-040101-generic x86_64
  NonfreeKernelModules: nvidia
  ApportVersion: 2.17.2-0ubuntu1.1
  Architecture: amd64
  CurrentDesktop: Unity
  Date: Wed Jul 15 23:17:44 2015
  InstallationDate: Installed on 2015-06-08 (37 days ago)
  InstallationMedia: Ubuntu 14.04 LTS "Trusty Tahr" - Release amd64 (20140417)
  ProcEnviron:
   TERM=xterm
   PATH=(custom, no user)
   XDG_RUNTIME_DIR=<set>
   LANG=de_DE.UTF-8
   SHELL=/bin/bash
  SourcePackage: grub2
  UpgradeStatus: Upgraded to vivid on 2015-06-09 (36 days ago)

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