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Thread: Installer doesnt detects windows 7 (EFI)

  1. #1
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    Installer doesnt detects windows 7 (EFI)

    This is my partition table...

    1.- EFI System partition 300 MB
    2.- A partition called DELLUTILITY with 40MB fat32
    3.- A partition called OS with Windows 7 and data file (This is where ubuntu should detect windows 7 and installs)
    4.- A partition called RECOVERY with 750 MB

    I want to install ubuntu alongside windows 7, I need an easy explanation, can anyone help me?.

    Thanks.
    Keep your friends close, but your enemies closer.

  2. #2
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    Re: Installer doesnt detects windows 7 (EFI)

    Boot into live mode with the cd and in terminal post the output of:
    sudo fdisk -l (small L)
    sudo parted /dev/sda print
    Darko.
    -----------------------------------------------------------------------
    Ubuntu 12.04 LTS 64bit & Windows 7 Ultimate 64bit

  3. #3
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    Re: Installer doesnt detects windows 7 (EFI)

    http://paste.org/48608

    There you are, and thanks.
    Keep your friends close, but your enemies closer.

  4. #4
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    Re: Installer doesnt detects windows 7 (EFI)

    I can't see anything wrong. Your win7 takes almost all of the hdd. You will have to open windows Disk Management first and shrink the partition for as much space as you want.

    Then you have to be careful with EFI because there was a bug in ubuntu that was overwriting windows efi files on the EFI system partition. I don't think it's solved yet.

    Just in case, copy the files from /dev/sda1 and keep them safe. Maybe you will need to copy them back if ubuntu deletes them.

    Investigate dual booting with EFI because there are some issues. I don't use EFI and don't have all the details.

    Look at post #10 here:
    http://ubuntuforums.org/showthread.php?t=1967058

    oldfred has more resources and links about EFI.
    Darko.
    -----------------------------------------------------------------------
    Ubuntu 12.04 LTS 64bit & Windows 7 Ultimate 64bit

  5. #5
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    Re: Installer doesnt detects windows 7 (EFI)

    Ok, I dont understand the link instrutions, I only want to dual boot, didnt know it was this hard, will wait for other answers or give up in installing ubuntu.

    Thanks.
    Keep your friends close, but your enemies closer.

  6. #6
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    Re: Installer doesnt detects windows 7 (EFI)

    The combination of efi + gpt is a bit complicated for dual boot right now. And that is exactly the combination you have.
    Darko.
    -----------------------------------------------------------------------
    Ubuntu 12.04 LTS 64bit & Windows 7 Ultimate 64bit

  7. #7
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    Re: Installer doesnt detects windows 7 (EFI)

    Ok, I have created 2 partitions, one for / and another for swap, and I have instaled ubuntu on it, now I boot into ubuntu, but grub doesnt seem to detect my windows 7 partition, how can I do to configure grub to detect it?.

    Thanks.
    Keep your friends close, but your enemies closer.

  8. #8
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    Re: Installer doesnt detects windows 7 (EFI)

    With UEFI boot you primarily choose what to boot from the efi menu. It should be giving you the options of systems installed in the efi partition to boot.
    You should have something like this which another user posted:

    find /boot/efi -name "*efi"
    /boot/efi
    /boot/efi/EFI/ubuntu/grubx64.efi
    /boot/efi/EFI/BOOT/bootx64.efi
    /boot/efi/EFI/Microsoft/Boot/bootmgfw.efi
    /boot/efi/EFI/Microsoft/Boot/bootmgr.efi
    /boot/efi/EFI/Microsoft/Boot/memtest.efi

    Dual boot UEFI & windows UEFI post 76
    http://ubuntuforums.org/showthread.php?t=1719851&page=8
    http://ubuntuforums.org/showthread.php?t=1746194


    Do you have something like this, that another user posted, except you need to add Windows from /efi/Microsoft:
    Enter your UEFI menu, select "Boot maintenance manager", then "Boot options", then "Add boot option", then "NO VOLUME LABEL,....Primary,Slave...1, GPT,..", then browse the /EFI/ubuntu/ folder via the UEFI boot menu, and select the grubx64.efi . Give it the name you want (eg "Precise"), then "Commit Changes and exit", then Enter.
    Another way is to modify 40_custom.
    http://askubuntu.com/questions/12519...grub2-question
    Last edited by oldfred; April 30th, 2012 at 05:47 AM.
    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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