Results 1 to 4 of 4

Thread: Problems with Grub

  1. #1
    Join Date
    Jan 2013
    Beans
    2

    Problems with Grub

    Hello!

    Yesterday i bought a new Laptop with Ubuntu on it(ASUS X55U-SX008D). First i tried to install Windows beside Ubuntu because my father didn't want to learn everything new. The installation didn't work because of EFI - i don't know why :/
    So I reinstall Ubuntu and everything worked till today.

    Now i get this error:

    error: file ' /boot/grub/x86_64-efi/normal.mod' not found
    grub rescue>

    I am not able to start the Ubuntu disk and reinstall the OS - i get this info:
    Reboot and select proper boot device or insert boot media in selected boot device



    I also tried this:

    1. Type ls to get a list of partitions
    2. Enter set prefix=(hd0,msdos6)/boot/grub [you will almost certainly have to enter a different drive/partition in the brackets, you may just have to try all of those listed by ls until you find the one that works.
    3. Type insmod normal
    4. Type normal and you will get your boot prompt back!



    The system gives respronse:


    -> error: disk 'hdo,gpt3' not found
    or
    -> unknown filesystem




    I hope you can help me!

    Alex

  2. #2
    Join Date
    Nov 2009
    Location
    Segur De Calafell, Spain
    Beans
    11,906
    Distro
    Ubuntu 12.04 Precise Pangolin

    Re: Problems with Grub

    First, do you have msdos or gpt table on the disk? And do you boot in uefi or the older legacy mode?

    Windows works with uefi only on gpt disks. Ubuntu doesn't care.

    But if you are using uefi boot then you need to install both ubuntu and windows in uefi mode. That means booting the ubuntu cd/usb from the uefi device, not the legacy device.

    If you are starting from scratch, it better not to use uefi. In that case disable it in bios if there is such option. Select the boot mode as Legacy Only.

    Then you can boot the ubuntu cd in live mode, wipe the disk if you don't have any important data on it, and create new blank msdos table.

    After that you can start installing, first windows giving it as much space as you want (bot not the whole hdd), and then ubuntu in the rest of the hdd.
    Darko.
    -----------------------------------------------------------------------
    Ubuntu 14.04 LTS 64bit & Windows 7 Ultimate 64bit

  3. #3
    Join Date
    Jan 2013
    Beans
    2

    Re: Problems with Grub

    First, thanks for the answer!

    Everytime I tried to install Windows(before i installed Ubuntu) - the Windows setup showed something like "Installation not available because the disk is in GPT style." :s

    I start the Bios Setup - under "Boot" there is an point called Boot configuration with "Launch PXE OpROM". I can set it from Enabled to disabled. I don't know if there is an option to deactivate Uefi or maybe I just don't find it.


    The deactivation/activation of "Launch PXE OpROM" dind't change my problem - I am still not able to boot from the Ubuntu Disk. It still says "Reboot and select proper boot device or insert boot media in selected boot device".

    Alex

  4. #4
    Join Date
    Nov 2009
    Location
    Segur De Calafell, Spain
    Beans
    11,906
    Distro
    Ubuntu 12.04 Precise Pangolin

    Re: Problems with Grub

    No, PXE is fot boot over a network.

    It seems the machine is not UEFI capable, which is good, no problem.

    But it also seems your hdd has GPT table and windows can't work on GPT without uefi. You will have to write new blank msdos table on the disk, which means you will lose all data on it. If there is anything you want to keep, make a backup first.

    After you have msdos table on the disk, you can install first windows or ubuntu, which ever you like. People usually install windows first, then ubuntu but it can work the other way too.
    Darko.
    -----------------------------------------------------------------------
    Ubuntu 14.04 LTS 64bit & Windows 7 Ultimate 64bit

Bookmarks

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •