Ubuntu grub rescue can’t be boot via live cd?

**Farzana** · 24-06-2011

I have a new Toshiba Satellite. Windows 7 is already installed; I shrunk the panel and began an Ubuntu 11.04 (64 bit) installation (such as a dual boot) from the LiveCD. It was from side to side most of the installation, but the computer from hibernation before terminating. I rebooted and ran GParted, eliminating the ext4 partition and rerun the installation of ubuntu. It forced me to reboot, and now the LiveCD freezes on the Ubuntu logo (with growth bar 4 points). Pressing Alt + F4 at boot I get this after a minute or two.

Code:

 [122.472619] SP5100 TC0 timer: mnio address 0xb8fe00 already in use

Taking the LiveCD out and booting, I get a "grub rescue>" prompt:

Code:

Booting from local disk...
error: unknown filesystem.
grub rescue> help
Unknown command `help'
grub rescue> ls
(hd0) (hd0,msdos7) (hd0,msdos6) (hd0,msdos5) (hd0,msdos3) (hd0,msdos2) (hd0,msdos1)
grub rescue> ls (hd0)
error: unknown filesystem.
grub rescue> ls (hd0,msdos7)
error: unknown filesystem.
grub rescue> ls (hd1)
error: hd1 cannot get C/H/S values.
grub rescue> ls (test)
error: no such disk.

I like to know if anyone has any suggestions for how to proceed before I start rooting around there.

**Chahel** · 24-06-2011

I’m also getting a similar behavior from other distributions, including DSL. That has concerned me from my typical draw near to modify the root will not work if you cannot boot at all. I was soon able to get by setting acpi = off, but the system froze after a minute or two, and after two boots, I cannot get more that way. I will be glad if anyone of you can help me in fixing the problem. Any help or suggestions would be great.

**Aleksandra** · 24-06-2011

Permanently alter the boot kernel options by default, or press ALT + F2 opens a terminal system> Accessories> Terminal. Type the following command:

Code:

gksudo gedit /etc/default/grub

A text editor will release with the grub configuration file. Near the top of that file you will see something very similar to this:

Code:

GRUB_DEFAULT=0
#GRUB_HIDDEN_TIMEOUT=0
GRUB_HIDDEN_TIMEOUT_QUIET=true
GRUB_TIMEOUT=10
GRUB_DISTRIBUTOR=`lsb_release -i -s 2> /dev/null || echo Debian`
GRUB_CMDLINE_LINUX_DEFAULT="quiet splash"
GRUB_CMDLINE_LINUX=""

Add your custom boot options to the GRUB_CMDLINE_LINUX_DEFAULT line, so for instance:

Code:

GRUB_DEFAULT=0
#GRUB_HIDDEN_TIMEOUT=0
GRUB_HIDDEN_TIMEOUT_QUIET=true
GRUB_TIMEOUT=10
GRUB_DISTRIBUTOR=`lsb_release -i -s 2> /dev/null || echo Debian`
GRUB_CMDLINE_LINUX_DEFAULT="quiet splash nomodeset"
GRUB_CMDLINE_LINUX=""

Save the file and exit gedit. If you have to add kernel options that contain quotation marks, add them as such:

Code:

GRUB_CMDLINE_LINUX_DEFAULT="quiet splash nomodeset acpi_osi=\"Linux\""

Now in the terminal, run the following command to update your grub configuration with the new default settings:

Code:

sudo update-grub

**GaganGang** · 24-06-2011

I was also facing similar problems exactly, but I am able to boot into an older version of GParted, which allowed me to wipe the Linux partition unfinished, and open a terminal to examine the Windows partitions. I'm not familiar with the location of the MBR and modified by hand, especially in a Windows partition. Can anybody spot me to resources on how to do this? Also, anybody with any hint as to why now cannot boot into a Linux LiveCD would be valued.

**Dolsy_bendal** · 24-06-2011

I guess this is a LiveCD version of GParted. If yes, run the startup script info please: Boot the Ubuntu Live CD / USB. Choose "Try Ubuntu lacking any change." Once you load the desktop back here and do the following:
1. Download the startup script info. There is a link in my signature.
2. Once downloaded, move the boot script information on the desktop.
3. Open a terminal and run the command

Code:

sudo bash ~/Desktop/boot_info_script*.sh

This will build a file on the desktop results.txt. Stick the entire contents of that file back here in a new post. Once trapped to emphasize all the text and click the # sign in the toolbar to place code tags around the text.

**Elijah** · 24-06-2011

I was also facing the similar problem. I will guide you how to fix this problem. you need to do following things.
1 Run Fixmbr.
2 Boot into windows.
3 Download unetbootin and convert iso into live usb or cd.
4 Run the boot info script.