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Thread: GRUB doesn't recognize Win8 and WBM doesn't load

  1. #1
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    GRUB doesn't recognize Win8 and WBM doesn't load

    EDIT: my solution to fix this can be found in page 2 of this thread!

    Hello,
    I'm writing as I am encountering lots of troubles in setting up my dual boot.
    I own an ASUS S56 ultrabook with UEFI. I've got installed Ubuntu 13.04 and Windows 8. I use Grub to choose the OS to be booted, but there is no trace of any "Windows" entry: on Grub's menu, in fact, there are only 3 options - "Ubuntu", "Advanced *something*" and "Setup Menu". I even tried to change the boot order: I put Windows Boot Manager at first - and I thought I would have skipped loading Grub, as I was trying to load Windows 8 without passing thru Grub - but it loads Grub anyways. Both the OSs are installed with UEFI. Boot-repair recognizes that Windows 8 exists on my system, and everything seems to work well while running boot-repair, but when I restart the PC there is no trace of Windows 8 in Grub menu.

    Here's the output of my BootInfo: http://paste.ubuntu.com/6070623/

    How can I fix this?

    Thanks in advance and regards.
    Davide Magni
    Last edited by magneto538; September 11th, 2013 at 10:20 AM. Reason: Thread solved

  2. #2
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    Re: GRUB doesn't recognize Win8 and WBM doesn't load

    Did this system have Windows 8 pre-installed? I looks like you now have Ubuntu & a Vista or data partition before the Windows 8 partition. But then partitions are not in the Windows expected order. Windows says the Microsoft reserved must be before the first data partition.

    Order on drive is important:
    http://en.wikipedia.org/wiki/Microso...rved_Partition

    Microsoft suggested partitions including reserved partition for gpt & UEFI:
    http://technet.microsoft.com/en-us/l...8WS.10%29.aspx
    Older Windows info on gpt - 2008 updated 2011
    http://msdn.microsoft.com/en-us/wind.../gg463525.aspx
    Windows technical info on gpt and GUIDs
    http://msdn.microsoft.com/library/wi...sktop/aa365449

    Not sure what else might be an issue. Does Windows boot directly from UEFI? As grub can only chainload to a working Windows.
    You also show a Windows boot loader in the MBR, so did you boot Boot-Repair in BIOS mode? Windows only boots with UEFI from gpt partitions.
    For info on UEFI boot install & repair - Updated Mar 2015:
    http://ubuntuforums.org/showthread.php?t=2147295
    Please use Thread Tools above first post to close thread when/if answered completely.







  3. #3
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    Re: GRUB doesn't recognize Win8 and WBM doesn't load

    So, what do you recommend to do? Should I erase everything from HDD (partitons & data) and start back from scratch? I see that, when installing, Windows creates a few partitions that are very important, and these are the partitions I have currently on HDD:



    So I think I'm missing something. What may be the best solution? Erase everything and install Win 8 BEFORE Ubuntu? And then run boot-repair from Ubuntu when installed?
    Last but not least, my PC had Win 8 Home (or something) installed, but I wanted it to be free from the tons of bloatware that was pre-installed (also, I had another copy of Win 8 Pro gifted from my university, so I wanted to use it), so I erased it and installed my own copy.

    As I'm sort of an absolute beginner, I really hope to find help here.

    Thank you!

  4. #4
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    Re: GRUB doesn't recognize Win8 and WBM doesn't load

    When you reinstalled Windows 8 did you install with secure boot. Not sure what a reinstall does.
    Did you also turn fast boot off. That is often a major issue as the hibernation causes all sorts of issues. If only booting one copy of Windows and nothing else it does make Windows faster, but any other configuration causes issues.
    I thought the MSR had to be before any data partition, but after rereading my link above, it just needs to be before the Windows system partition, so your partition layout should work.

    WARNING for Windows 8 Dual-Booters
    http://ubuntuforums.org/showthread.php?t=1953674
    It defaults shutdown to a hybrid hibernation/off state for fast boot
    http://www.kapilarya.com/how-to-enab...p-in-windows-8
    But then files may be corrupted similar to Windows 7 Hibernation:
    http://ubuntu-with-wubi.blogspot.ca/...rid-sleep.html
    http://superuser.com/questions/14472...te-w-dual-boot
    Fast Startup off/hibernation
    http://www.eightforums.com/tutorials...ndows-8-a.html
    Force removal of hiberfil from Ubuntu
    http://www.hecticgeek.com/2013/01/mo...u-hybrid-boot/
    http://blogs.msdn.com/b/b8/archive/2...windows-8.aspx
    User who fixed Windows 8
    http://ubuntuforums.org/showthread.php?t=2171156s
    For info on UEFI boot install & repair - Updated Mar 2015:
    http://ubuntuforums.org/showthread.php?t=2147295
    Please use Thread Tools above first post to close thread when/if answered completely.







  5. #5
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    Re: GRUB doesn't recognize Win8 and WBM doesn't load

    I didn't have neither secure boot nor fast boot activated when I installed any of the OSs, and they're still disabled. At this point, I really don't figure out what to do... Better burn Ubuntu down and go back to Win 8, if I can't have both running properly on my system. Hope someone has better advices.

  6. #6
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    Re: GRUB doesn't recognize Win8 and WBM doesn't load

    How are you trying to boot Windows? Did you try directly from UEFI menu?
    Also grub2's os-prober does not create correct chain load entries. You have to use Boot-Repair to fix that bug.
    For info on UEFI boot install & repair - Updated Mar 2015:
    http://ubuntuforums.org/showthread.php?t=2147295
    Please use Thread Tools above first post to close thread when/if answered completely.







  7. #7
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    Re: GRUB doesn't recognize Win8 and WBM doesn't load

    What do you mean with "UEFI menu"? I've tried to boot Win from boot menu (by putting Windows Boot Master as first boot device), I don't see any other way to do it (but maybe I'm missing something).
    I used boot-repair, like, 15 times. Here's a screen of boot-repair's advanced options. As I have a UEFI-based PC, before running "Recommended Repair" I have to change something in Advanced Settings (sorry for the OS's language, it's Italian):

    As you can see, I have to check "Separated /boot/efi partition", which is sda1 (as you can see in the screenshot from my previous post). I can also choose which OS to be loaded by default from the menu: I can choose between "sda 2 (Currently running OS - Ubuntu 13.04)" and "Windows 8 (via sda2 menu)". This means that boot-repair is able to recognize that on my system there is installed Windows 8, but whatever option I choose from the menu, nothing changes when I boot the system. Everytime, at startup, I am redirected to Grub, that only shows me the entries to load Ubuntu.

  8. #8
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    Re: GRUB doesn't recognize Win8 and WBM doesn't load

    Post link to BootInfo report from Boot-Repair.

    You should get something like these which others posted from their UEFI menus. Windows should be a choice unless you renamed the Windows efi file using Boot-Repair.
    Attached Images Attached Images
    For info on UEFI boot install & repair - Updated Mar 2015:
    http://ubuntuforums.org/showthread.php?t=2147295
    Please use Thread Tools above first post to close thread when/if answered completely.







  9. #9
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    Re: GRUB doesn't recognize Win8 and WBM doesn't load

    My BootInfo: http://paste.ubuntu.com/6070623/


    ...and my System Setup (one of the tabs is "Boot"):

    IMG_4720.jpgIMG_4722.jpgIMG_4724.jpgIMG_4723.jpg

    EDIT: when I try to click on "Recommended Repair" on boot-repair (without changing any Advanced Setting), I get the following message:

    GPT detected. Please create a BIOS-Boot partition (>1MB, unformatted filesystem, bios_grub flag). This can be performed via tools such as Gparted. Then try again.
    Alternatively, you can retry after activating the [Separate /boot/efi partition:] option.
    Until now, I tried only to activate "Separate /boot/efi partition" option, as I explained a few post ago. Should I try to create a "BIOS-Boot partition" as suggested by this error message? And, in this case, what should I do with the existing /boot/efi partition?

    This whole thing is blowing my mind.
    Last edited by magneto538; September 10th, 2013 at 12:49 PM. Reason: Added some more info

  10. #10
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    Re: GRUB doesn't recognize Win8 and WBM doesn't load

    You booted in BIOS mode. BIOS mode needs a bios_grub partition to install grub correctly, but you want UEFI mode. But you need to boot the Boot-Repair in UEFI mode not BIOS mode.
    For info on UEFI boot install & repair - Updated Mar 2015:
    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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