[Bug 887836] Re: update-grub does not create btrfs menuentry in grub.cfg

[Vishal Rao]

As of Ubuntu Jammy , it appears the issue is os-prober not handling
btrfs subvolumes other than the main ID 5 subvol... So if another OS is
installed with /@ as root , it does not recognise it.

See https://aur.archlinux.org/cgit/aur.git/tree/os-prober-
btrfsfix.patch?h=os-prober-btrfs for the Arch version of the patch (also
attached)

** Patch added: "Fixed in Arch distro"
   https://bugs.launchpad.net/ubuntu/+source/os-prober/+bug/887836/+attachment/5692197/+files/os-prober-btrfsfix.patch

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https://bugs.launchpad.net/bugs/887836

Title:
  update-grub does not create btrfs menuentry in grub.cfg

Status in os-prober:
  New
Status in os-prober package in Ubuntu:
  Triaged

Bug description:
  Hi,

  I have noticed that update-grub have never been generating menuentry in grub.cfg for btrfs ubuntu oneiric 64bit instance. This happens when I run update-grub on another ubuntu instance , does not matter if ext4 or btrfs.
  (I have to manually change 40_custom for new installed kernels )
  Could you confirm if it is bug or I messed up something ?

  thank you,
  regards,
  Martin
  --- 
  ApportVersion: 1.23-0ubuntu4
  Architecture: amd64
  DistroRelease: Ubuntu 11.10
  InstallationMedia: Ubuntu 11.04 "Natty Narwhal" - Release amd64 (20110427.1)
  NonfreeKernelModules: fglrx
  Package: os-prober 1.49ubuntu1
  PackageArchitecture: amd64
  ProcEnviron:
   LANGUAGE=en_GB:en
   PATH=(custom, no user)
   LANG=en_GB.UTF-8
   SHELL=/bin/bash
  ProcVersionSignature: Ubuntu 3.0.0-17.30~pre201203010400-generic 3.0.22
  Tags:  oneiric
  Uname: Linux 3.0.0-17-generic x86_64
  UpgradeStatus: Upgraded to oneiric on 2011-10-15 (141 days ago)
  UserGroups: adm admin audio backup cdrom clamav dialout disk games kvm libuuid lpadmin plugdev proxy pulse pulse-access sambashare syslog users utmp vboxusers video www-data

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