Grub/ Ubuntu 10.04 has taken over system!

[iGuitar]

I recently installed Lucid Lynx and it has given me tons of problems. I used to dual boot between Windows Vista and Ubuntu 9.10. It worked great! I could use both operating systems without a hitch.

However, since I have installed Lucid it has rendered Vista and it's recovery hard drive useless. I even tried to boot from a vista recovery disk from the bios. I pressed enter on the cd rom drive from the boot menu and it just took me to the useless grub menu.

It seems Grub has messed up something when i upgraded to Lucid.

[vipin.balakrishnan]

Can you please give us the error you are getting in GRUB.

[iGuitar]

Well when I select either Windows Vista or its recovery hard drive I get a black screen with a blinking cursor.

[zeepal]

Did you upgrade from 9.10 to 10.04 or a fresh install? (nvm I need to read!)

You may want to try running the following as it will update the grub cfg file:

sudo update-grub

[iGuitar]

Updated Grub. I still have the same problem.

[vipin.balakrishnan]

Hi iGuitar

Did you tried to reinstall GRUB,

• First, grab a copy of the latest Ubuntu LiveCD and boot it.
• Open a terminal and type

$ sudo fdisk -l

• Mount the file system of your linuxto /mnt

$ sudo mount /dev/sda1 /mnt

• If you have /boot on a separate partition, that need's to be mounted as well. For reference, /dev/sda2 will be used.

$ sudo mount /dev/sda2 /mnt/boot Make sure you don't mix these up, pay attention to the output of FDISK

• Now mount the rest of your devices and some other things needed in the chroot

$ sudo mount --bind /dev /mnt/dev
$ sudo mount --bind /proc /mnt/proc
$ sudo mount --bind /sys /mnt/sys

• Now chroot into your system

$ sudo chroot /mnt
You should be chroot'd into your system as root, you can now run commands as root, without the need for sudo.

• Now you need to edit the /etc/default/grub file to fit your system

$ nano /etc/default/grub

• When that is done you need to run update-grub to create the configuration file.

$ update-grub

• To install GRUB 2 to the MBR, next you need to run grub-install /dev/sda

$ grub-install /dev/sda

• If you encounter any errors, try grub-install --recheck /dev/sda

$ grub-install --recheck /dev/sda

• Press Ctrl+D to exit out of the chroot.
• Once you exit back to your regular console, undo all the mounting, first the /dev and others

$ sudo umount /mnt/dev
$ sudo umount /mnt/sys
$ sudo umount /mnt/proc
Now you can unmount the root system. (But if you have a separate boot partition which you mounted earlier, you have to unmount this first, or you will get a "device busy" error message.)