Thread: No boot and no grub menu

i installed oneiric, single boot, before christmas on new computer , working until today.

suddenly, not boot, flashing cursor @ top left of screen.

tried repeatedly grub menu pressing shift (i had before during initial install , worked fine @ time) , time cannot it.



got boot info script , results.txt.

boot info script 0.60 17 may 2011


============================= boot info summary: ===============================

=> grub2 (v1.99) installed in mbr of /dev/sda , looks @ sector 1 of
same hard drive core.img. core.img @ location , looks
on drive.
=> no boot loader installed in mbr of /dev/sdb.

sda1: __________________________________________________ ________________________

file system: ext4
boot sector type: -
boot sector info:
operating system: ubuntu 11.10
boot files: /boot/grub/grub.cfg /etc/fstab /boot/grub/core.img

sda2: __________________________________________________ ________________________

file system: extended partition
boot sector type: -
boot sector info:

sda5: __________________________________________________ ________________________

file system: swap
boot sector type: -
boot sector info:

sdb1: __________________________________________________ ________________________

file system: ext3
boot sector type: -
boot sector info:
operating system:
boot files:

============================ drive/partition info: =============================

drive: sda __________________________________________________ ___________________

disk /dev/sda: 500.1 gb, 500107862016 bytes
255 heads, 63 sectors/track, 60801 cylinders, total 976773168 sectors
units = sectors of 1 * 512 = 512 bytes
sector size (logical/physical): 512 bytes / 512 bytes

partition boot start sector end sector # of sectors id system

/dev/sda1 * 2,048 943,253,503 943,251,456 83 linux
/dev/sda2 943,255,550 976,771,071 33,515,522 5 extended
/dev/sda5 943,255,552 976,771,071 33,515,520 82 linux swap / solaris


drive: sdb __________________________________________________ ___________________

disk /dev/sdb: 500.1 gb, 500107862016 bytes
255 heads, 63 sectors/track, 60801 cylinders, total 976773168 sectors
units = sectors of 1 * 512 = 512 bytes
sector size (logical/physical): 512 bytes / 512 bytes

partition boot start sector end sector # of sectors id system

/dev/sdb1 2,048 976,769,023 976,766,976 83 linux


"blkid" output: __________________________________________________ ______________

device uuid type label

/dev/loop0 squashfs
/dev/sda1 f1965049-d36d-4326-a8e1-237c33fb2a25 ext4
/dev/sda5 dc760ac6-3457-4ef9-8341-cab2dc32cdc3 swap
/dev/sdb1 1d149e82-d7a2-498b-9883-6f1048dea2db ext3

================================ mount points: =================================

device mount_point type options

/dev/loop0 /rofs squashfs (ro,noatime)
/dev/sr0 /cdrom iso9660 (ro,noatime)


=========================== sda1/boot/grub/grub.cfg: ===========================

--------------------------------------------------------------------------------
#
# not edit file
#
# automatically generated grub-mkconfig using templates
# /etc/grub.d , settings /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 "${have_grubenv}" ]; if [ -z "${boot_once}" ]; save_env recordfail; fi; fi
}

function load_video {
insmod vbe
insmod vga
insmod video_bochs
insmod video_cirrus
}

insmod part_msdos
insmod ext2
set root='(hd0,msdos1)'
search --no-floppy --fs-uuid --set=root f1965049-d36d-4326-a8e1-237c33fb2a25
if loadfont /usr/share/grub/unicode.pf2 ; then
set gfxmode=auto
load_video
insmod gfxterm
insmod part_msdos
insmod ext2
set root='(hd0,msdos1)'
search --no-floppy --fs-uuid --set=root f1965049-d36d-4326-a8e1-237c33fb2a25
set locale_dir=($root)/boot/grub/locale
set lang=en_gb
insmod gettext
fi
terminal_output gfxterm
if [ "${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
if background_color 44,0,30; then
clear
fi
### end /etc/grub.d/05_debian_theme ###

### begin /etc/grub.d/10_linux ###
if [ ${recordfail} != 1 ]; then
if [ -e ${prefix}/gfxblacklist.txt ]; then
if hwmatch ${prefix}/gfxblacklist.txt 3; then
if [ ${match} = 0 ]; then
set linux_gfx_mode=keep
else
set linux_gfx_mode=text
fi
else
set linux_gfx_mode=text
fi
else
set linux_gfx_mode=keep
fi
else
set linux_gfx_mode=text
fi
export linux_gfx_mode
if [ "$linux_gfx_mode" != "text" ]; load_video; fi
menuentry 'ubuntu, linux 3.0.0-14-generic' --class ubuntu --class gnu-linux --class gnu --class os {
recordfail
set gfxpayload=$linux_gfx_mode
insmod gzio
insmod part_msdos
insmod ext2
set root='(hd0,msdos1)'
search --no-floppy --fs-uuid --set=root f1965049-d36d-4326-a8e1-237c33fb2a25
linux /boot/vmlinuz-3.0.0-14-generic root=uuid=f1965049-d36d-4326-a8e1-237c33fb2a25 ro quiet splash vt.handoff=7
initrd /boot/initrd.img-3.0.0-14-generic
}
menuentry 'ubuntu, linux 3.0.0-14-generic (recovery mode)' --class ubuntu --class gnu-linux --class gnu --class os {
recordfail
insmod gzio
insmod part_msdos
insmod ext2
set root='(hd0,msdos1)'
search --no-floppy --fs-uuid --set=root f1965049-d36d-4326-a8e1-237c33fb2a25
echo 'loading linux 3.0.0-14-generic ...'
linux /boot/vmlinuz-3.0.0-14-generic root=uuid=f1965049-d36d-4326-a8e1-237c33fb2a25 ro recovery nomodeset
echo 'loading initial ramdisk ...'
initrd /boot/initrd.img-3.0.0-14-generic
}
submenu "previous linux versions" {
menuentry 'ubuntu, linux 3.0.0-12-generic' --class ubuntu --class gnu-linux --class gnu --class os {
recordfail
set gfxpayload=$linux_gfx_mode
insmod gzio
insmod part_msdos
insmod ext2
set root='(hd0,msdos1)'
search --no-floppy --fs-uuid --set=root f1965049-d36d-4326-a8e1-237c33fb2a25
linux /boot/vmlinuz-3.0.0-12-generic root=uuid=f1965049-d36d-4326-a8e1-237c33fb2a25 ro quiet splash vt.handoff=7
initrd /boot/initrd.img-3.0.0-12-generic
}
menuentry 'ubuntu, linux 3.0.0-12-generic (recovery mode)' --class ubuntu --class gnu-linux --class gnu --class os {
recordfail
insmod gzio
insmod part_msdos
insmod ext2
set root='(hd0,msdos1)'
search --no-floppy --fs-uuid --set=root f1965049-d36d-4326-a8e1-237c33fb2a25
echo 'loading linux 3.0.0-12-generic ...'
linux /boot/vmlinuz-3.0.0-12-generic root=uuid=f1965049-d36d-4326-a8e1-237c33fb2a25 ro recovery nomodeset
echo 'loading initial ramdisk ...'
initrd /boot/initrd.img-3.0.0-12-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,msdos1)'
search --no-floppy --fs-uuid --set=root f1965049-d36d-4326-a8e1-237c33fb2a25
linux16 /boot/memtest86+.bin
}
menuentry "memory test (memtest86+, serial console 115200)" {
insmod part_msdos
insmod ext2
set root='(hd0,msdos1)'
search --no-floppy --fs-uuid --set=root f1965049-d36d-4326-a8e1-237c33fb2a25
linux16 /boot/memtest86+.bin console=ttys0,115200n8
}
### end /etc/grub.d/20_memtest86+ ###

### begin /etc/grub.d/30_os-prober ###
if [ "x${timeout}" != "x-1" ]; then
if keystatus; then
if keystatus --shift; then
set timeout=-1
else
set timeout=0
fi
else
if sleep --interruptible 3 ; then
set timeout=0
fi
fi
fi
### end /etc/grub.d/30_os-prober ###

### begin /etc/grub.d/40_custom ###
# file provides easy way add custom menu entries. type the
# menu entries want add after comment. careful not change
# '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 ###
--------------------------------------------------------------------------------

=============================== sda1/etc/fstab: ================================

--------------------------------------------------------------------------------
# /etc/fstab: static file system information.
#
# use 'blkid' print universally unique identifier a
# device; may used uuid= more robust way name devices
# works if disks added , removed. see fstab(5).
#
# <file system> <mount point> <type> <options> <dump> <pass>
proc /proc proc nodev,noexec,nosuid 0 0
# / on /dev/sda1 during installation
uuid=f1965049-d36d-4326-a8e1-237c33fb2a25 / ext4 errors=remount-ro 0 1
# swap on /dev/sda5 during installation
uuid=dc760ac6-3457-4ef9-8341-cab2dc32cdc3 none swap sw 0 0
--------------------------------------------------------------------------------

=================== sda1: location of files loaded grub: ====================

gib - gb file fragment(s)

= boot/grub/core.img 1
= boot/grub/grub.cfg 1
= boot/initrd.img-3.0.0-12-generic 1
= boot/initrd.img-3.0.0-14-generic 2
= boot/vmlinuz-3.0.0-12-generic 1
= boot/vmlinuz-3.0.0-14-generic 1
= initrd.img.old 1
= vmlinuz 1
= vmlinuz.old 1

========= devices don't seem have corresponding hard drive: =========

sdc sdd sde sdf

=============================== stderr messages: ===============================

unlzma: decoder error
awk: cmd. line:36: math support not compiled in
awk: cmd. line:36: math support not compiled in
awk: cmd. line:36: math support not compiled in
awk: cmd. line:36: math support not compiled in
awk: cmd. line:36: math support not compiled in
awk: cmd. line:36: math support not compiled in
awk: cmd. line:36: math support not compiled in
awk: cmd. line:36: math support not compiled in
awk: cmd. line:36: math support not compiled in

have no idea of means , , need booting computer again.

suddenly, not boot, flashing cursor @ top left of screen.

maybe external hard drives causing this?

Forum The Ubuntu Forum Community Ubuntu Official Flavours Support General Help [SOLVED] No boot and no grub menu

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