[Bug 758887] Re: Following kernel upgrade to 2.6.38-8.42, grub2 generates duplicate entries in the menu

[Manjul Apratim]

I am changing the problem description to "os-prober requires partitions
with other operating systems to be mounted to correctly enumerate
entries", since this persists on Precise and the workaround is still the
same - after mounting my debian and slackware partitions, the entries
detected are correct.

** Summary changed:

- Following kernel upgrade to 2.6.38-8.42, grub2 generates duplicate entries in the menu
+ os-prober requires partitions with other operating systems to be mounted to correctly enumerate entries

** Summary changed:

- os-prober requires partitions with other operating systems to be mounted to correctly enumerate entries
+ os-prober requires partitions with other operating systems to be mounted to correctly enumerate entries in grub2

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Title:
  os-prober requires partitions with other operating systems to be
  mounted to correctly enumerate entries in grub2

Status in “grub2” package in Ubuntu:
  New

Bug description:
  Binary package hint: grub2

  I just went with a system update yesterday for Natty Beta 1, and grub2
  upon "sudo update-grub" generates duplicate entries in the menu.

  Here are certain diagnostic outputs:

  -------------------------------------------------------------------------------------------------------------------------------------------------------------------------------

  manjul at chaar:~$ uname -a
  Linux chaar 2.6.38-8-generic #42-Ubuntu SMP Mon Apr 11 03:31:50 UTC 2011 i686 i686 i386 GNU/Linux
  manjul at chaar:~$ dpkg -l | grep linux-image
  ii  linux-image-2.6.38-8-generic          2.6.38-8.42                                Linux kernel image for version 2.6.38 on x86/x86_64
  ii  linux-image-generic                   2.6.38.8.22                                Generic Linux kernel image
  manjul at chaar:~$ sudo update-grub
  [sudo] password for manjul: 
  Generating grub.cfg ...
  Found background: /usr/share/images/grub/Windbuchencom.tga
  Found background image: /usr/share/images/grub/Windbuchencom.tga
  Found linux image: /boot/vmlinuz-2.6.38-8-generic
  Found initrd image: /boot/initrd.img-2.6.38-8-generic
  Found memtest86+ image: /memtest86+.bin
  Found Arch on /dev/sda4
  Found Debian GNU/Linux (wheezy/sid) on /dev/sda7
  Found Slackware Linux (Slackware 13.1.0) on /dev/sda8
  Found Gentoo Base System release 1.12.14 on /dev/sda9
  done

  -------------------------------------------------------------------------------------------------------------------------------------------------------------------------------

  I have attached here the file /boot/grub/grub.cfg generated by the
  above command, which will show the duplicate entries - they refer to
  the same linux-image in each of the distros, as is indicated by the
  uuid's

  ProblemType: Bug
  DistroRelease: Ubuntu 11.04
  Package: grub-pc 1.99~rc1-12ubuntu1
  ProcVersionSignature: Ubuntu 2.6.38-8.42-generic 2.6.38.2
  Uname: Linux 2.6.38-8-generic i686
  NonfreeKernelModules: wl
  Architecture: i386
  Date: Tue Apr 12 11:22:28 2011
  InstallationMedia: Ubuntu 10.04 LTS "Lucid Lynx" - Release i386 (20100429)
  ProcEnviron:
   LANGUAGE=en_US:en
   LANG=en_US.UTF-8
   SHELL=/bin/bash
  SourcePackage: grub2
  UpgradeStatus: Upgraded to natty on 2011-04-06 (6 days ago)

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