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Thread: Dual-boot and EFI issue.

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  1. #1
    Join Date
    Jun 2012
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    3

    Wink Dual-boot and EFI issue.

    (repost) Im helping a friend deal with a dual-boot issue (Windows 7 and Ubuntu (Kubuntu) 12.4). He has a 64-bit Samsung laptop with 8GB and a Tb Disk. It came with Windows 7 and EFI with a 100Mb sda1 partition. He installed Ubuntu 12.4 and GRUB2 naturally pointed to both Ubuntu and Windows, but when he booted Windows, it said it had to do some recovery stuff and undid GRUB, hence no booting into Ubuntu. He reinstalled Ubuntu and it set up GRUB2 but this time no Windows boot entry. I went over to his place last week and installed the new boot-repair utility and ran it, which restored the Windows entry, but Windows doesn't boot because of an EFI issue (and until then I knew zero about EFI/UEFI). Boot-repair prints out a little window which gives some info about where EFI should point to, and this probably will solve the Windows boot issue, but this requires configuring I'm not familiar with. How to point GRUB2 and EFI boot to properly boot Windows 7? Thanks in advance.

  2. #2
    Join Date
    Jun 2012
    Beans
    21

    Smile Re: Dual-boot and EFI issue.

    hi, i didn get u and i don knw UFI/etc but i can help u ...we have a program called boot-repair which detects the OSs installed on your HDD and repairs/sets,the GRUB..so that you can boot from either of your OSs........please check this
    https://help.ubuntu.com/community/Boot-Repair

  3. #3
    Join Date
    Nov 2009
    Beans
    Hidden!
    Distro
    Kubuntu 14.04 Trusty Tahr

    Re: Dual-boot and EFI issue.

    he already ran that. please read the thread before posting something.

    to the OP have a look here: https://help.ubuntu.com/community/UEFIBooting
    and maybe here... ugh...: https://wiki.ubuntu.com/UEFI-howto

    user friendly? not really. and since most computer will now be built using UEFI i would expect a better/easier solution.
    Easy to understand Ubuntu manual with lots of pics: http://ubuntu-manual.org/
    Do i need antivirus/firewall in linux?
    User friendly disk backup: Redobackup

  4. #4
    Join Date
    Jan 2008
    Location
    France
    Beans
    Hidden!
    Distro
    Ubuntu Development Release

    Question Re: Dual-boot and EFI issue.

    Hello

    Quote Originally Posted by ahanabu View Post
    Boot-repair prints out a little window which gives some info about where EFI should point to, and this probably will solve the Windows boot issue
    What was this message? What was the BootInfo URL that appeared after you used Boot-Repair?
    if you don't remember, please run Boot-Repair again, click "recommended repair" and indicate the new URL that will appear.

  5. #5
    Join Date
    Jun 2012
    Beans
    3

    Smile Re: Dual-boot and EFI issue.

    Quote Originally Posted by YannBuntu View Post
    What was this message? What was the BootInfo URL that appeared after you used Boot-Repair?
    if you don't remember, please run Boot-Repair again, click "recommended repair" and indicate the new URL that will appear.
    Hi, and thanks for the help. I don't have access to my friends computer at the moment, and won't until perhaps tomorrow or even later. If I can reach him on Facebook, I might be able to get this info sooner. I will post when I can. Regards,

  6. #6
    Join Date
    Oct 2012
    Beans
    12

    Re: Dual-boot and EFI issue.

    You don't necessarily need to dual boot Windows and Linux on UEFI. Follow the guide http://www.youtube.com/watch?v=PEou2dIcMSE to convert your UEFI to MBR-BIOS without loss of data. Or read about it here: http://commandlinewani.blogspot.com/...sony-vaio.html

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