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I installed 12.04 LTS on my computer that already had Vista 64 Ultimate. Installation said that reboot was necesarry to use the new installation. Well, it just boots right into vista without giving me a boot option for ubuntu. Any help would be much appreciated.

I've installed and used ubuntu in the past, but I still consider myself a newbie.

user76770
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2 Answers2

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You can try to repair GRUB.

  1. To do this, boot from any Live CD and open a terminal.

  2. Mount the partition with your installed Ubuntu by entering 

    sudo mount /dev/sda? /mnt

    Important: replace the '?' with the partition where you installed Ubuntu! If you don't know which partition this is, open gparted and look for it.

  3. Include the directory with important device information

    sudo mount -o bind /dev /mnt/dev

    and /sys

    sudo mount -o bind /sys /mnt/sys

    and the interface data

    sudo mount -t proc /proc /mnt/proc

  4. Now change into the mounted system:

    sudo chroot /mnt /bin/bash

  5. Then you can install GRUB by typing

    grub-install /dev/sda

    and

    update-grub

    If you get Errors with the last step, just mention it in a comment.

  6. Exit the terminal with exit.

Hope this is helpful for you.

slashcrack
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0

Please boot your installation CD and select to "try Ubuntu". Then, open a terminal by searching for "Terminal" in the launcher. Then, run the following command, one-by-one.

sudo add-apt-repository ppa:yannubuntu/boot-repair && sudo apt-get update

sudo apt-get install -y boot-repair && boot-repair

Then, run boot-repair from the terminal.
Use the "Recommended repair", and it will do a repair and give you a URL(If it prompts you to install pastebinit, then do so. Please post the URL here.

Also, if you get worried about Windows doing a chkdsk, read the following quote:

It should be noted for those new to Linux though that when you start Windows after using this tool it will run chkdisk on the windows partition, so don't panic.

nanofarad
  • 20,906