Ubuntu
grub2 package

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

Bug #896391 reported by keepitsimpleengr on 2011-11-25

This bug affects 1 person

Affects		Status	Importance	Assigned to	Milestone
	grub2 (Ubuntu)	Expired	Undecided	Unassigned

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@...:~# 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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