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Dara Javaherian
July 2nd, 2010, 05:41 PM
Hello all,

I installed Ubuntu 10.04 from a Live CD today. Everything seemed to go fine, I chose to wipe the entire disk. However, it would only startup once. Now, when I turn on my laptop, all I get is a blank screen.

I had a look at my partitions with GParted on the Live CD and noticed that there was a 1 MiB unallocated space just before it.

Like this:

http://i218.photobucket.com/albums/cc189/DaraJava/Screenshot--dev-sda-GParted-2.png

If anyone could help me it would be greatly appreciated. :)

P.S. I can look through the files on the installed Linux partition when I put in the Live CD, so I don't think anything's corrupted.

darkod
July 2nd, 2010, 06:28 PM
That doesn't show much. Run the boot info script following the link in my signature and post the content of the results file as explained. It shows more info and maybe we can figure it out.

Dara Javaherian
July 2nd, 2010, 06:42 PM
That doesn't show much. Run the boot info script following the link in my signature and post the content of the results file as explained. It shows more info and maybe we can figure it out.

Here you go!


Boot Info Script 0.55 dated February 15th, 2010

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

=> Grub 2 is installed in the MBR of /dev/sda and looks on the same drive in
partition #1 for /boot/grub.

sda1: __________________________________________________ _______________________

File system: ext4
Boot sector type: -
Boot sector info:
Operating System: Ubuntu 10.04 LTS
Boot files/dirs: /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:

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

Drive: sda ___________________ __________________________________________________ ___

Disk /dev/sda: 120.0 GB, 120034123776 bytes
255 heads, 63 sectors/track, 14593 cylinders, total 234441648 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 * 2,048 224,827,391 224,825,344 83 Linux
/dev/sda2 224,829,438 234,440,703 9,611,266 5 Extended
/dev/sda5 224,829,440 234,440,703 9,611,264 82 Linux swap / Solaris


blkid -c /dev/null: __________________________________________________ __________

Device UUID TYPE LABEL

/dev/loop0 squashfs
/dev/sda1 a16b4dab-4531-491e-a30a-e383a3932c9c ext4
/dev/sda2: PTTYPE="dos"
/dev/sda5 313d4a77-1bee-46e2-9570-c88e8dd23ccd swap
/dev/sda: PTTYPE="dos"

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

Device Mount_Point Type Options

aufs / aufs (rw)
/dev/sr0 /cdrom iso9660 (ro,noatime)
/dev/loop0 /rofs squashfs (ro,noatime)
/dev/sr0 /media/apt iso9660 (ro)
/dev/sda1 /media/a16b4dab-4531-491e-a30a-e383a3932c9c ext4 (rw,nosuid,nodev,uhelper=udisks)


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

#
# DO NOT EDIT THIS FILE
#
# It is automatically generated by /usr/sbin/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
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 ${boot_once} ]; then save_env recordfail; fi; fi
}
insmod ext2
set root='(hd0,1)'
search --no-floppy --fs-uuid --set a16b4dab-4531-491e-a30a-e383a3932c9c
if loadfont /usr/share/grub/unicode.pf2 ; then
set gfxmode=640x480
insmod gfxterm
insmod vbe
if terminal_output gfxterm ; then true ; else
# For backward compatibility with versions of terminal.mod that don't
# understand terminal_output
terminal gfxterm
fi
fi
insmod ext2
set root='(hd0,1)'
search --no-floppy --fs-uuid --set a16b4dab-4531-491e-a30a-e383a3932c9c
set locale_dir=($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 2.6.32-21-generic' --class ubuntu --class gnu-linux --class gnu --class os {
recordfail
insmod ext2
set root='(hd0,1)'
search --no-floppy --fs-uuid --set a16b4dab-4531-491e-a30a-e383a3932c9c
linux /boot/vmlinuz-2.6.32-21-generic root=UUID=a16b4dab-4531-491e-a30a-e383a3932c9c ro quiet splash
initrd /boot/initrd.img-2.6.32-21-generic
}
menuentry 'Ubuntu, with Linux 2.6.32-21-generic (recovery mode)' --class ubuntu --class gnu-linux --class gnu --class os {
recordfail
insmod ext2
set root='(hd0,1)'
search --no-floppy --fs-uuid --set a16b4dab-4531-491e-a30a-e383a3932c9c
echo 'Loading Linux 2.6.32-21-generic ...'
linux /boot/vmlinuz-2.6.32-21-generic root=UUID=a16b4dab-4531-491e-a30a-e383a3932c9c ro single
echo 'Loading initial ramdisk ...'
initrd /boot/initrd.img-2.6.32-21-generic
}
### END /etc/grub.d/10_linux ###

### BEGIN /etc/grub.d/20_memtest86+ ###
menuentry "Memory test (memtest86+)" {
insmod ext2
set root='(hd0,1)'
search --no-floppy --fs-uuid --set a16b4dab-4531-491e-a30a-e383a3932c9c
linux16 /boot/memtest86+.bin
}
menuentry "Memory test (memtest86+, serial console 115200)" {
insmod ext2
set root='(hd0,1)'
search --no-floppy --fs-uuid --set a16b4dab-4531-491e-a30a-e383a3932c9c
linux16 /boot/memtest86+.bin console=ttyS0,115200n8
}
### END /etc/grub.d/20_memtest86+ ###

### BEGIN /etc/grub.d/30_os-prober ###
if [ ${timeout} != -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 ###
# 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 ###

=============================== sda1/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/sda1 during installation
UUID=a16b4dab-4531-491e-a30a-e383a3932c9c / ext4 errors=remount-ro 0 1
# swap was on /dev/sda5 during installation
UUID=313d4a77-1bee-46e2-9570-c88e8dd23ccd none swap sw 0 0

=================== sda1: Location of files loaded by Grub: ===================


68.8GB: boot/grub/core.img
73.1GB: boot/grub/grub.cfg
68.8GB: boot/initrd.img-2.6.32-21-generic
68.8GB: boot/vmlinuz-2.6.32-21-generic
68.8GB: initrd.img
68.8GB: vmlinuz

darkod
July 2nd, 2010, 07:12 PM
Hmmm... it all looks fine. I have no clue, sorry. :(

If the cd works in live mode, that should rule out video issues and similar.

Dara Javaherian
July 2nd, 2010, 07:21 PM
Hmmm... it all looks fine. I have no clue, sorry. :(

If the cd works in live mode, that should rule out video issues and similar.

:-/ This worries me. Could there be something wrong with my disk? Should I format everything and reinstall?

Dara Javaherian
July 3rd, 2010, 01:03 AM
:-/ This worries me. Could there be something wrong with my disk? Should I format everything and reinstall?

OK, well I reformatted/reinstalled and everything seems to be ok now. There is still a 1 MiB blank space before my Ubuntu partition though for some reason.

darkod
July 3rd, 2010, 01:32 AM
OK, well I reformatted/reinstalled and everything seems to be ok now. There is still a 1 MiB blank space before my Ubuntu partition though for some reason.

Don't worry about that. With more and more SSDs being used, I think they designed Lucid to leave 1MB unallocated at start first. The SSD needs the first 1MB to be unallocated so it can use it for garbage collection feature.

Dara Javaherian
July 3rd, 2010, 02:04 AM
Don't worry about that. With more and more SSDs being used, I think they designed Lucid to leave 1MB unallocated at start first. The SSD needs the first 1MB to be unallocated so it can use it for garbage collection feature.

Cool, I guess my problem's solved then. :)