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naushad97
December 2nd, 2010, 02:48 AM
I am new to the Linux environment. I recently installed Ubuntu 10.04 on my dell studio laptop (i3 processor) in dual boot with Windows 7. The installation went fine .
The problem is when i restarted for the first time i was able to see the grub boot loader but after selecting windows 7 and again restarting the system from windows 7 there was no boot loader found. Not even windows bootloader or gurb.
The system just displayed a message that no OS image found.
This is happening for ubuntu 10.10 also.
But there is no such problem when I installed ubuntu 8.
I want to install ubuntu 10.04 and need help for fixing the grub.

wilee-nilee
December 2nd, 2010, 03:25 AM
Identify the computer model or brand at least and follow this.

So from a booted live Ubuntu cd or thumbdrive lets see the bootscript read out; in my signature just click on it and follow the instructions. Come back to the thread and click on the # in the reply panel this makes code tags paste all the text in between.

naushad97
December 3rd, 2010, 10:04 PM
Boot Info Script 0.55 dated February 15th, 2010

============================= Boot Info Summary: ==============================

=> Windows is installed in the MBR of /dev/sda
=> Syslinux is installed in the MBR of /dev/sdb

sda1: __________________________________________________ _______________________

File system: vfat
Boot sector type: Fat16
Boot sector info: No errors found in the Boot Parameter Block.
Operating System:
Boot files/dirs: /COMMAND.COM

sda2: __________________________________________________ _______________________

File system: ntfs
Boot sector type: Windows Vista/7
Boot sector info: No errors found in the Boot Parameter Block.
Operating System:
Boot files/dirs: /bootmgr /Boot/BCD

sda3: __________________________________________________ _______________________

File system: ntfs
Boot sector type: Windows Vista/7
Boot sector info: No errors found in the Boot Parameter Block.
Operating System: Windows 7
Boot files/dirs: /Windows/System32/winload.exe

sda4: __________________________________________________ _______________________

File system: Extended Partition
Boot sector type: Grub
Boot sector info: Grub is installed in the boot sector of sda4 and looks
at sector 590293756 of the same hard drive for the
stage2 file, but no stage2 files can be found at this
location.

sda5: __________________________________________________ _______________________

File system: ntfs
Boot sector type: Windows Vista/7
Boot sector info: According to the info in the boot sector, sda5 starts
at sector 2. But according to the info from fdisk,
sda5 starts at sector 211206144.
Operating System:
Boot files/dirs:

sda6: __________________________________________________ _______________________

File system: ntfs
Boot sector type: Windows Vista/7
Boot sector info: According to the info in the boot sector, sda6 starts
at sector 2048.
Operating System:
Boot files/dirs:

sda7: __________________________________________________ _______________________

File system: ntfs
Boot sector type: Windows Vista/7
Boot sector info: According to the info in the boot sector, sda7 starts
at sector 2048.
Operating System:
Boot files/dirs:

sda8: __________________________________________________ _______________________

File system: ext4
Boot sector type: -
Boot sector info:
Operating System: Ubuntu 10.10
Boot files/dirs: /boot/grub/grub.cfg /etc/fstab /boot/grub/core.img

sdb1: __________________________________________________ _______________________

File system: vfat
Boot sector type: Unknown
Boot sector info: No errors found in the Boot Parameter Block.
Operating System:
Boot files/dirs:

=========================== Drive/Partition Info: =============================

Drive: sda ___________________ __________________________________________________ ___

Disk /dev/sda: 320.1 GB, 320072933376 bytes
255 heads, 63 sectors/track, 38913 cylinders, total 625142448 sectors
Units = sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes

Partition Boot Start End Size Id System

/dev/sda1 63 257,039 256,977 de Dell Utility
/dev/sda2 * 258,048 19,390,463 19,132,416 7 HPFS/NTFS
/dev/sda3 19,390,464 211,205,550 191,815,087 7 HPFS/NTFS
/dev/sda4 211,206,142 625,141,759 413,935,618 f W95 Ext d (LBA)
/dev/sda5 211,206,144 330,383,359 119,177,216 7 HPFS/NTFS
/dev/sda6 330,385,408 490,129,407 159,744,000 7 HPFS/NTFS
/dev/sda7 490,131,456 580,243,455 90,112,000 7 HPFS/NTFS
/dev/sda8 580,245,504 625,141,759 44,896,256 83 Linux


Drive: sdb ___________________ __________________________________________________ ___

Disk /dev/sdb: 4016 MB, 4016046080 bytes
90 heads, 25 sectors/track, 3486 cylinders, total 7843840 sectors
Units = sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes

Partition Boot Start End Size Id System

/dev/sdb1 * 8,192 7,843,839 7,835,648 b W95 FAT32


blkid -c /dev/null: __________________________________________________ __________

Device UUID TYPE LABEL

/dev/loop0 squashfs
/dev/sda1 07DA-0319 vfat DellUtility
/dev/sda2 882442252442171A ntfs RECOVERY
/dev/sda3 58F44676F4465702 ntfs OS
/dev/sda4: PTTYPE="dos"
/dev/sda5 C68ED5448ED52DA5 ntfs New Volume
/dev/sda6 968092C38092A96F ntfs Movies & Data
/dev/sda7 3C38B2FC38B2B46C ntfs MuSiK
/dev/sda8 de8fa464-8007-4989-8139-3bde728a511b ext4
/dev/sda: PTTYPE="dos"
/dev/sdb1 16E0-7AAD vfat PENDRIVE
/dev/sdb: PTTYPE="dos"

============================ "mount | grep ^/dev output: ===========================

Device Mount_Point Type Options

aufs / aufs (rw)
/dev/sdb1 /cdrom vfat (rw,relatime,fmask=0022,dmask=0022,codepage=cp437, iocharset=iso8859-1,shortname=mixed,errors=remount-ro)
/dev/loop0 /rofs squashfs (ro,noatime)


=========================== sda8/boot/grub/grub.cfg: ===========================

#
# DO NOT EDIT THIS FILE
#
# It is automatically generated by grub-mkconfig using templates
# from /etc/grub.d and settings from /etc/default/grub
#

### BEGIN /etc/grub.d/00_header ###
if [ -s $prefix/grubenv ]; then
set have_grubenv=true
load_env
fi
set default="0"
if [ "${prev_saved_entry}" ]; then
set saved_entry="${prev_saved_entry}"
save_env saved_entry
set prev_saved_entry=
save_env prev_saved_entry
set boot_once=true
fi

function savedefault {
if [ -z "${boot_once}" ]; then
saved_entry="${chosen}"
save_env saved_entry
fi
}

function recordfail {
set recordfail=1
if [ -n "${have_grubenv}" ]; then if [ -z "${boot_once}" ]; then save_env recordfail; fi; fi
}

function load_video {
insmod vbe
insmod vga
}

insmod part_msdos
insmod ext2
set root='(hd0,msdos8)'
search --no-floppy --fs-uuid --set de8fa464-8007-4989-8139-3bde728a511b
if loadfont /usr/share/grub/unicode.pf2 ; then
set gfxmode=640x480
load_video
insmod gfxterm
fi
terminal_output gfxterm
insmod part_msdos
insmod ext2
set root='(hd0,msdos8)'
search --no-floppy --fs-uuid --set de8fa464-8007-4989-8139-3bde728a511b
set locale_dir=($root)/boot/grub/locale
set lang=en
insmod gettext
if [ "${recordfail}" = 1 ]; then
set timeout=-1
else
set timeout=10
fi
### END /etc/grub.d/00_header ###

### BEGIN /etc/grub.d/05_debian_theme ###
set menu_color_normal=white/black
set menu_color_highlight=black/light-gray
### END /etc/grub.d/05_debian_theme ###

### BEGIN /etc/grub.d/10_linux ###
menuentry 'Ubuntu, with Linux 2.6.35-22-generic' --class ubuntu --class gnu-linux --class gnu --class os {
recordfail
insmod part_msdos
insmod ext2
set root='(hd0,msdos8)'
search --no-floppy --fs-uuid --set de8fa464-8007-4989-8139-3bde728a511b
linux /boot/vmlinuz-2.6.35-22-generic root=UUID=de8fa464-8007-4989-8139-3bde728a511b ro quiet splash
initrd /boot/initrd.img-2.6.35-22-generic
}
menuentry 'Ubuntu, with Linux 2.6.35-22-generic (recovery mode)' --class ubuntu --class gnu-linux --class gnu --class os {
recordfail
insmod part_msdos
insmod ext2
set root='(hd0,msdos8)'
search --no-floppy --fs-uuid --set de8fa464-8007-4989-8139-3bde728a511b
echo 'Loading Linux 2.6.35-22-generic ...'
linux /boot/vmlinuz-2.6.35-22-generic root=UUID=de8fa464-8007-4989-8139-3bde728a511b ro single
echo 'Loading initial ramdisk ...'
initrd /boot/initrd.img-2.6.35-22-generic
}
### END /etc/grub.d/10_linux ###

### BEGIN /etc/grub.d/20_linux_xen ###
### END /etc/grub.d/20_linux_xen ###

### BEGIN /etc/grub.d/20_memtest86+ ###
menuentry "Memory test (memtest86+)" {
insmod part_msdos
insmod ext2
set root='(hd0,msdos8)'
search --no-floppy --fs-uuid --set de8fa464-8007-4989-8139-3bde728a511b
linux16 /boot/memtest86+.bin
}
menuentry "Memory test (memtest86+, serial console 115200)" {
insmod part_msdos
insmod ext2
set root='(hd0,msdos8)'
search --no-floppy --fs-uuid --set de8fa464-8007-4989-8139-3bde728a511b
linux16 /boot/memtest86+.bin console=ttyS0,115200n8
}
### END /etc/grub.d/20_memtest86+ ###

### BEGIN /etc/grub.d/30_os-prober ###
menuentry "Windows 7 (loader) (on /dev/sda2)" {
insmod part_msdos
insmod ntfs
set root='(hd0,msdos2)'
search --no-floppy --fs-uuid --set 882442252442171a
chainloader +1
}
### END /etc/grub.d/30_os-prober ###

### BEGIN /etc/grub.d/40_custom ###
# This file provides an easy way to add custom menu entries. Simply type the
# menu entries you want to add after this comment. Be careful not to change
# the 'exec tail' line above.
### END /etc/grub.d/40_custom ###

### BEGIN /etc/grub.d/41_custom ###
if [ -f $prefix/custom.cfg ]; then
source $prefix/custom.cfg;
fi
### END /etc/grub.d/41_custom ###

=============================== sda8/etc/fstab: ===============================

# /etc/fstab: static file system information.
#
# Use 'blkid -o value -s UUID' to print the universally unique identifier
# for a device; this may be used with UUID= as a more robust way to name
# devices that works even if disks are added and removed. See fstab(5).
#
# <file system> <mount point> <type> <options> <dump> <pass>
proc /proc proc nodev,noexec,nosuid 0 0
# / was on /dev/sda8 during installation
UUID=de8fa464-8007-4989-8139-3bde728a511b / ext4 errors=remount-ro 0 1

=================== sda8: Location of files loaded by Grub: ===================


314.4GB: boot/grub/core.img
312.2GB: boot/grub/grub.cfg
312.4GB: boot/initrd.img-2.6.35-22-generic
314.4GB: boot/vmlinuz-2.6.35-22-generic
312.4GB: initrd.img
314.4GB: vmlinuz
=========================== Unknown MBRs/Boot Sectors/etc =======================

Unknown BootLoader on sdb1

00000000 eb 58 90 53 59 53 4c 49 4e 55 58 00 02 08 56 04 |.X.SYSLINUX...V.|
00000010 02 00 00 00 00 f8 00 00 3f 00 ff 00 00 20 00 00 |........?.... ..|
00000020 00 90 77 00 d5 1d 00 00 00 00 00 00 02 00 00 00 |..w.............|
00000030 01 00 06 00 00 00 00 00 00 00 00 00 00 00 00 00 |................|
00000040 80 00 29 ad 7a e0 16 4e 4f 20 4e 41 4d 45 20 20 |..).z..NO NAME |
00000050 20 20 46 41 54 33 32 20 20 20 fa fc 31 c9 8e d1 | FAT32 ..1...|
00000060 bc 76 7b 52 06 57 8e c1 b1 26 bf 78 7b f3 a5 8e |.v{R.W...&.x{...|
00000070 d9 bb 78 00 0f b4 37 0f a0 56 20 d2 78 1b 31 c0 |..x...7..V .x.1.|
00000080 b1 06 89 3f 89 47 02 f3 64 a5 8a 0e 18 7c 88 4d |...?.G..d....|.M|
00000090 bc 50 50 50 50 cd 13 eb 4b f6 45 b4 7f 75 25 38 |.PPPP...K.E..u%8|
000000a0 4d b8 74 20 66 3d 21 47 50 54 75 10 80 7d b8 ed |M.t f=!GPTu..}..|
000000b0 75 0a 66 ff 75 ec 66 ff 75 e8 eb 0f 51 51 66 ff |u.f.u.f.u...QQf.|
000000c0 75 bc eb 07 51 51 66 ff 36 1c 7c b4 08 cd 13 72 |u...QQf.6.|....r|
000000d0 13 20 e4 75 0f c1 ea 08 42 89 16 1a 7c 83 e1 3f |. .u....B...|..?|
000000e0 89 0e 18 7c fb bb aa 55 b4 41 8a 16 74 7b cd 13 |...|...U.A..t{..|
000000f0 72 10 81 fb 55 aa 75 0a f6 c1 01 74 05 c6 06 32 |r...U.u....t...2|
00000100 7d 00 66 b8 e0 e7 15 00 66 ba 00 00 00 00 bb 00 |}.f.....f.......|
00000110 7e e8 10 00 66 81 3e 24 7e 34 be f5 72 75 76 ea |~...f.>$~4..ruv.|
00000120 38 7e 00 00 66 03 06 64 7b 66 13 16 68 7b b9 10 |8~..f..d{f..h{..|
00000130 00 eb 2b 66 52 66 50 06 53 6a 01 6a 10 89 e6 66 |..+fRfP.Sj.j...f|
00000140 60 b4 42 e8 7f 00 66 61 8d 64 10 72 01 c3 66 60 |`.B...fa.d.r..f`|
00000150 31 c0 e8 70 00 66 61 e2 da c6 06 32 7d 2b 66 60 |1..p.fa....2}+f`|
00000160 66 0f b7 36 18 7c 66 0f b7 3e 1a 7c 66 f7 f6 31 |f..6.|f..>.|f..1|
00000170 c9 87 ca 66 f7 f7 66 3d ff 03 00 00 77 17 c0 e4 |...f..f=....w...|
00000180 06 41 08 e1 88 c5 88 d6 b8 01 02 e8 37 00 66 61 |.A..........7.fa|
00000190 72 01 c3 e2 c9 31 f6 8e d6 bc 6c 7b 8e de 66 8f |r....1....l{..f.|
000001a0 06 78 00 be cc 7d e8 09 00 31 c0 cd 16 cd 19 f4 |.x...}...1......|
000001b0 eb fd 66 60 ac 20 c0 74 09 b4 0e bb 07 00 cd 10 |..f`. .t........|
000001c0 eb f2 66 61 c3 8a 16 74 7b cd 13 c3 42 6f 6f 74 |..fa...t{...Boot|
000001d0 20 65 72 72 6f 72 0d 0a 00 00 00 00 00 00 00 00 | error..........|
000001e0 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 |................|
000001f0 00 00 00 00 00 00 00 00 00 00 00 00 00 00 55 aa |..............U.|
00000200

oldfred
December 3rd, 2010, 10:13 PM
You have grub2 installed to the partition boot sector of the extended partition. That will not hurt anything as it is unused space, but you need grub2 installed to the MBR of sda.
Reinstall grub2 - Short version
https://help.ubuntu.com/community/Grub2#Reinstalling%20GRUB%202
full chroot version:
https://wiki.ubuntu.com/Grub2#Recover%20Grub%202%20via%20LiveCD

#Install MBR from LiveCD, Ubuntu install on sda5 and want grub2 in drive sda's MBR:
#Find linux partition, change sda8 if not correct, and/or even sda if sdb wanted:
sudo fdisk -l
#confirm that linux is sda8
sudo mount /dev/sda8 /mnt sudo grub-install --root-directory=/mnt/ /dev/sda
#If that returns any errors run:
sudo grub-install --recheck --root-directory=/mnt/ /dev/sda

note that last commands refer to sda the drive not to partitions like sda8.

naushad97
December 4th, 2010, 03:53 AM
I tried it. It works fine and I am able to see the grub menu after restart.
Now the problem is that if i select Ubuntu from the grub menu then i am able to boot into it but if i select windows 7 from it and restart (from within windows) the grub menu is again lost and i cannot boot into any OS, the system fails to find any OS installed.
I tried using EasyBCD also from within windows but it restores only the windows 7 mbr and is not able to include the corresponding Linux entry.

oldfred
December 4th, 2010, 05:27 AM
You are running a Dell:

Writes to MBR-----------------------------------
http://sourceforge.net/apps/mediawiki/bootinfoscript/index.php?title=Boot_Problems:Windows_Writes_To_MB R
http://www.supergrubdisk.org/wiki/WindowsErasesGrub
http://linux.slashdot.org/story/10/08/28/2112208/Some-Windows-Apps-Make-GRUB-2-Unbootable
In Windows 7, I had to remove Windows 7 DataSafe.
HP ProtectTools, Dell Recovery, and a few others write into MBR meierfra.
https://bugs.launchpad.net/ubuntu/+source/grub2/+bug/441941
https://bugs.edge.launchpad.net/ubuntu/+source/grub2/+bug/441941?comments=all
Dell Media direct or Uninstall Dell DataSafe issues with MBR
http://ubuntuforums.org/showpost.php?p=9330849&postcount=9

naushad97
December 5th, 2010, 03:33 AM
Thanks a ton Oldfred.
You are a lifesaver. "Dell Datasafe" was the culprit. I uninstalled Dell Datasafe from windows and then reinstalled ubuntu.
And now everything is fine. There is no MBR corruption.
Thanks again.