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Thread: Ubuntu will not boot without USB plugged in

  1. #1
    Join Date
    Jan 2011
    Beans
    8

    Question Ubuntu will not boot without USB plugged in

    After I select to boot Ubuntu (I dual boot Vista Ultimate 64.), it just sits at a black screen with the blinking dash.
    Cannot enter anything and it will just sit there. But if I plug in my Flash Drive it will boot into Ubuntu either before starting the computer or while Im stuck in the black screen.
    Plugging in the drive while I am in the black screen will make it boot right up. The drive will light up and a couple lines that quickly say something will show up on the screen and then it boots.
    This Flash Drive contains Ubuntu and is what I used to Install Ubuntu.

  2. #2
    Join Date
    Sep 2008
    Location
    Philadelphia, PA
    Beans
    5,193
    Distro
    Ubuntu 12.04 Precise Pangolin

    Re: Ubuntu will not boot without USB plugged in

    With the flash drive plugged in:

    Let's get a better look at your setup & boot process. Boot into Ubuntu. Come back here and do the following:

    1. Download the boot info script. There is a link in my signature.
    2. Move the boot info script to the desktop.
    3. Open a terminal and run the command
    Code:
    sudo bash ~/Desktop/boot_info_script*.sh
    This will create a RESULTS.txt file on the desktop. Paste the entire contents of that file back here. Once pasted highlight all text and click the # sign on the toolbar to place code tags around the text.

    See here for more info on the boot info script.
    Multi-boot: Arch linux, Ubuntu 12.04, Windows 7 & Windows 8

  3. #3
    Join Date
    Jul 2005
    Location
    England
    Beans
    Hidden!

    Re: Ubuntu will not boot without USB plugged in

    When you installed ubuntu, where did you put grub? In most cases it would be put onto the MBR of the internal disk, ie your Vista disk, and that isprobably where it is at the moment. However, all the configuration files for grub are in the ubuntu install on the usb, so if that is not attached grub fails.

    Download and install the boot-info-script shown in my signature and it will help sort out the problem. Follow the instructions on the sute and post back the RESULTS.txt file here in code tags, ie, highlight the txt file and hit the # top right in the reply box.
    DISTRO: Xubuntu 12.04-64bit --- Code-tags --- Boot-Repair --- Grub2 wiki & Grub2 Basics --- RootSudo

  4. #4
    Join Date
    Jan 2011
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    8

    Post Re: Ubuntu will not boot without USB plugged in

    Alright, got it
    Attached Files Attached Files

  5. #5
    Join Date
    Jan 2011
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    8

    Post Re: Ubuntu will not boot without USB plugged in

    Alright, got it

  6. #6
    Join Date
    Jan 2011
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    8

    Post Re: Ubuntu will not boot without USB plugged in

    Alright, got it

  7. #7
    Join Date
    Jan 2011
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    8

    Re: Ubuntu will not boot without USB plugged in

    Alright, got it
    Attached Files Attached Files

  8. #8
    Join Date
    Jan 2011
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    8

    Post Re: Ubuntu will not boot without USB plugged in

    Alright, got it. It didn't ask me anything about Grub when I installed.

  9. #9
    Join Date
    Jan 2011
    Beans
    8

    Post Re: Ubuntu will not boot without USB plugged in

    Alright, got it. It didn't ask me about GRUB when I installed.

    Edit] Forums were not working right so I kept trying to get my post to go through. Guess it worked....
    Attached Files Attached Files

  10. #10
    Join Date
    Jun 2009
    Location
    Chicago Suburbs
    Beans
    Hidden!
    Distro
    Ubuntu 14.04 Trusty Tahr

    Re: Ubuntu will not boot without USB plugged in

    Forum went berserk and started double posting.

    Your BIOS seems to promote the flash drive to sda. If you try to boot from your 120GB does it work? I have two 160GB drives and in BIOS have to sometimes try both. If looks like the windows will not boot as you do not have a boot flag on sdc1, so that drive may be the one not booting.

    If not boot into Ubuntu and reinstall grub to sdb. Double check that it still is sdb, as you want grub2 installed to the MBR of the drive with Ubuntu.

    reinstall from working (not liveCD) system - first find Ubuntu drive:
    sudo fdisk -l
    if it's "/dev/sdb" then just run:
    sudo grub-install /dev/sdb
    If that returns any errors run:
    sudo grub-install --recheck /dev/sdb
    sudo update-grub
    to get grub to remember where to reinstall on updates:
    sudo dpkg-reconfigure grub-pc
    Enter thru first pages,spacebar to choose/unchoose drive, enter to accept, do not choose partitions

    Again confirm with fdisk that the windows drive is sdc.

    set boot flag on for sdc1 (off on others)
    sudo sfdisk -A1 /dev/sdc

    Then in BIOS one 120GB drive should boot Ubuntu and the other 120GB drive should boot windows. Set default to boot Ubuntu drive and you can choose Ubuntu or windows, but if you ever have troubles with the Ubuntu drive you should be able to boot windows by changing BIOS.
    Oldfred on vacation. Back Sept 9. Will not have much if any Internet access.
    For info on UEFI boot install & repair:
    http://ubuntuforums.org/showthread.php?t=2147295
    Please use Thread Tools above first post to close thread when/if answered completely.







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