[Bug 896391] Re: grub fails to launch windows, UUID not found, workaround bricks system

[Marcus Tomlinson]

This release of Ubuntu is no longer receiving maintenance updates. If
this is still an issue on a maintained version of Ubuntu please let us
know.

** Changed in: grub2 (Ubuntu)
       Status: New => Incomplete

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Title:
  grub fails to launch windows, UUID not found, workaround bricks system

Status in grub2 package in Ubuntu:
  Incomplete

Bug description:
  New, clean install of x86 11.10 Desktop from CD with network upgrade.

  After install, grub will not launch Windows, although Windows launches
  with BIOS boot disk selection.

  Verified UUID correct...
  root at ...:~# blkid
  /dev/sda1: TYPE="swap" 
  /dev/sda2: LABEL="SATA2_01__D" UUID="23181E9787F9E1A6" TYPE="ntfs" 
  /dev/sda3: LABEL="DRIVE_W" UUID="D71A-96E7" TYPE="vfat" 
  /dev/sdc1: LABEL="SATA_01_Csys_10k" UUID="6258C1DF8F242D86" TYPE="ntfs" 
  /dev/sdd1: LABEL="SATA_01_D_10k" UUID="6947F57DE005AA85" TYPE="ntfs" 
  /dev/sdd5: LABEL="SATA2_01_E" UUID="4BC2AEB11E651F37" TYPE="ntfs" 
  /dev/sdd6: LABEL="SATA2_01_D_BU_101222" UUID="2D2D0850B3A6BE7B" TYPE="ntfs" 
  /dev/sdb1: LABEL="SATA2_02_L" UUID="EF0625F841CA9127" TYPE="ntfs" 
  /dev/sde3: UUID="c713bb8e-f6d3-4269-935e-c9c86804f0a8" TYPE="ext4" 
  /dev/sde5: LABEL="IDE_01_G" UUID="1989E973D755FDC1" TYPE="ntfs" 
  /dev/sde6: UUID="15efbdad-ec18-43a9-bd80-6053c13624a7" TYPE="swap" 
  /dev/sde7: UUID="5c7f6d42-ad53-4a4a-befc-48e2d1594c31" TYPE="ext4" 
  /dev/sde8: UUID="bfc3f076-462c-4c16-8bd2-509b51ba0e01" TYPE="swap" 
  /dev/sdf1: LABEL="IDE_02_H" UUID="34709ADA709AA262" TYPE="ntfs" 

  from /boot/grub/grub.cfg
  ### BEGIN /etc/grub.d/30_os-prober ###
  menuentry "Microsoft Windows XP Professional (on /dev/sdc1)" --class windows --$
          savedefault
          insmod part_msdos
          insmod ntfs
          set root='(hd2,msdos1)'
          search --no-floppy --fs-uuid --set=root 6258C1DF8F242D86
          drivemap -s (hd0) ${root}
          chainloader +1
  }
  ### END /etc/grub.d/30_os-prober ###

  tried the workaround @
  http://sourceforge.net/apps/mediawiki/bootinfoscript/index.php?title=Boot_Problems:search

  Commenting out three lines in /usr/lib/grub/grub-mkconfig_lib (Step 4)

  This bricked grub2, booting 11.10 gets "error: no such partition"
  and booting Windows gets: "error: invalid signature"

  Undoing the changes (using chroot and the LiveCD) and rerunnin update-
  grub restored the original grub boot process.

  ProblemType: Bug
  DistroRelease: Ubuntu 11.10
  Package: grub-pc 1.99-12ubuntu5
  ProcVersionSignature: Ubuntu 3.0.0-13.22-generic 3.0.6
  Uname: Linux 3.0.0-13-generic i686
  NonfreeKernelModules: fglrx
  ApportVersion: 1.23-0ubuntu4
  Architecture: i386
  Date: Fri Nov 25 11:48:42 2011
  InstallationMedia: Ubuntu 11.10 "Oneiric Ocelot" - Release i386 (20111012)
  SourcePackage: grub2
  UpgradeStatus: No upgrade log present (probably fresh install)

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