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Thread: Dual Boot Ubuntu + Windows 8

  1. #1
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    Exclamation Dual Boot Ubuntu + Windows 8

    I have been having problems installing ubuntu 12.04.1 lts on a new UEFI enabled laptop. I had problems at first trying to get a live CD working but I was able to get it to load.

    The issue is whenever I try to install ubuntu either from the live cd or grub menu, I am not given an option to install alongside windows. I keep getting an error telling me that there is no installed OS. I have windows 8 build 9200 working perfectly but it is not recognized by ubuntu.
    I have tried some fixes but without success.

    Fixes include: removing dmraid; using boot-repair; and doing a clean install of windows 8. Any help would be appreciated.

  2. #2
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    Re: Dual Boot Ubuntu + Windows 8 installation help

    This may help you out. I think you would have better luck with 12.10
    https://help.ubuntu.com/community/UEFI
    Castles Made of Sand,
    Fall in the Sea,
    Eventually!

  3. #3
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    Re: Dual Boot Ubuntu + Windows 8 installation help

    Is this an Ultra-Boot? That adds a level of complication. What system is it?

    Also be sure to turn off fast boot in UEFI and secure boot to install.

    The Intel SRT uses RAID somehow and that is why Ubuntu's desktop installer usually does not see the Windows install.

    Intel Smart Response Technology
    http://www.intel.com/p/en_US/support...ts/chpsts/imsm
    Some general info in post #3
    http://ubuntuforums.org/showthread.php?t=2071242
    ubuntu 12.10 & Windows 8 oem Sony T & Intel SRT
    http://ubuntuforums.org/showthread.php?t=2090605
    For more info on UEFI boot install & repair - Regularly Updated :
    http://ubuntuforums.org/showthread.php?t=2147295
    Please use Thread Tools above first post to change to [Solved] when/if answered completely.

  4. #4
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    Re: Dual Boot Ubuntu + Windows 8 installation help

    Quote Originally Posted by arpanaut View Post
    This may help you out. I think you would have better luck with 12.10
    https://help.ubuntu.com/community/UEFI
    I have already tried to use that document before posting and i prefer 12.04.1 due to the stability. I'm currently using a Toshiba Satellite S855-S5378 system. I have both secure boot + fast boot in the BIOS and set them to disabled/normal boot respectively. Even after enabling them and disabling them there is no change.

    Although, I found out that the windows partition was unable to be accessed through the ubuntu live cd until i turned off the fast boot in windows 8 OS. Still no success.

    Before seeking advice on the forum I tried to manually install ubuntu using the "something else" option. I created a ext4 partition for ubuntu and the grub boot files in the UEFI partition already created by windows 8. The install was successful but after restarting the windows loader kicks in. I ran the live cd once more to run boot-repair and it fixed the grub bootloader. On the screen I had 7 choices, 2 for ubuntu(os+recovery) memory test x2, and 3 windows loaders, each named differently. I was never able to load windows from any of the loaders, even after a windows boot repair attempt.

    I would still prefer to have the option to install ubuntu alongside windows 8, but if someone could help use the "something else" option that would be great too!

  5. #5
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    Re: Dual Boot Ubuntu + Windows 8 installation help

    In a couple of weeks there will be another point release of 12.04. That will include the grub2 2.00 that is in 12.10 and works with secure boot.

    If secure boot is off, grub2 1.99 from 12.04 should work as its efi has worked with Windows 7 in UEFI mode.
    You need fast boot off and secure boot off but UEFI on.
    Some confuse that with UEFI on meaning secure boot off or several toggle switches that prevent once setting or another depending.
    But you do not want Ubuntu in BIOS/legacy mode as then it cannot chain load into Windows.

    Some UEFI implementations only boot Windows. Boot-Repair will optionally rename the secure boot shim file from 12.10 to Windows efi file and then create a chain load to the backup of the Windows efi file. Boot repair then may not be able to auto rename with 12.04.

    Boot-Repair - Updated Jan 1, 2013 to not rename first time, but rename if first time Windows does not boot. Post 706 and 711
    http://ubuntuforums.org/showthread.p...769482&page=71
    Boot-Repair copied /EFI/ubuntu/grubx64.efi to /EFI/Boot/bootx64.efi (in case the BIOS is hard-coded to boot into /EFI/Boot/bootx64.efi or secure boot
    signed GRUB file shimx64.efi.


    To perform this, just run Boot-Repair --> Adv options --> tick "Backup and rename EFI files" --> Apply
    Then reboot the PC and please tell us what you observe.


    Not your system but may give some clues.
    sony vaio laptop error: symbol not found: `grub_efi_secure_boot'.
    http://ubuntuforums.org/showthread.php?t=2102083
    So this time I installed 12.10, then I booted again from liveCD, made backup of (efi part)/EFI/microsoft/boot and copied all files from /EFI/ubuntu into it. Then renamed /EFI/microsoft/boot/shimx64.efi to bootmgfw.efi. And it works
    Used Boot-Repair to rename files:
    http://ubuntuforums.org/showthread.php?t=2103778
    For more info on UEFI boot install & repair - Regularly Updated :
    http://ubuntuforums.org/showthread.php?t=2147295
    Please use Thread Tools above first post to change to [Solved] when/if answered completely.

  6. #6
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    Re: Dual Boot Ubuntu + Windows 8 installation help

    Thanks again oldFred for your replies. I will try out your solution tomorrow, with the backing up and renaming of the EFI boot file.

    I will also include the generated boot-repair url with the results. I will do a fresh install of ubuntu 12.04.1 (after installing win8 of course) and probably have to do the something else option.
    Correct me if im wrong, but I do believe that I should choose the boot dir in the same partition as the window UEFI according to this documentation : https://help.ubuntu.com/community/UEFI

  7. #7
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    Re: Dual Boot Ubuntu + Windows 8 installation help

    Yes, but do not confuse the efi partition which is like the old MBR in BIOS but allows multiple boot loader in that partition with a separate /boot partition that has kernels and grub folder.
    With most desktops, a separate /boot partition is not required.
    For more info on UEFI boot install & repair - Regularly Updated :
    http://ubuntuforums.org/showthread.php?t=2147295
    Please use Thread Tools above first post to change to [Solved] when/if answered completely.

  8. #8
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    Cool Re: Dual Boot Ubuntu + Windows 8 installation help

    Hello, I have the same laptop, but I will install ubuntu 12.10, and I have some questions...

    My lapotp comes with windows 8 and UEFI pre-installed. First, I disabled secure boot, and put in normal the speed of boot following the instructions of https://help.ubuntu.com/community/UEFI

    First of all I have an usb with ubuntu 12.10 for install.

    My problem is in the section of guide:
    Identifying if the computer boots the HDD in EFI mode: I know that the computer boot the usb in EFI mode, but i don´t know if the hdd run in EFI mode.
    1- Can I proceed with the instalation even if I don´t sure if my hdd run in efi or not?
    2- I think that I don´t need to change de boot mode to legacy such as my windows8 was installed in UEFI mode. That is correct?
    3- About de process of instalation, I understand that I can use the same EFI boot partition of windows for linux? That´s correct?
    I think is /dev/sda2 in the image attached: http://ubuntuforums.org/attachment.p...1&d=1359757237

    What represent the other partitions??(Are come with manufactured installation)

    4- The last questions is about the instalation process: always when I install ubuntu, I select ¨something else¨ in partition process and I defined the / paritition, /home parition and swap partition. That is the same now? I am very confused because I read that I need to define a /boot partition or something??

    Thank you for your help...
    Attached Images Attached Images

  9. #9
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    Re: Dual Boot Ubuntu + Windows 8 installation help

    You normally do not need a /boot.

    Your efi is the FAT32 with the boot flag which in gparted or parted is shown with boot flag, but actually it means something totally different in gpt partitions than in MBR(msdos) partitions.

    You need to use Windows Disk Mangement to shrink Windows and reboot a couple of times to get it to run chkdsk and make other repairs do to the resize.

    Make backups of efi partition and main Windows partition.
    The vendor recovery DVDs are just an image of your drive as purchased. If you have housecleaned a lot of cruft normally included, run many updates with many reboots, and added software you may want a full back up.
    Backup windows before install - post by Mark Phelps
    http://ubuntuforums.org/showthread.php?t=2040149
    http://ubuntuforums.org/showthread.php?t=1626990
    http://www.macrium.com/reflectfree.asp
    Another suggestion by srs5694
    http://www.runtime.org/driveimage-xml.htm


    Windows 8 UEFI repair USB must be FAT32
    http://www.eightforums.com/tutorials...ndows-8-a.html
    http://social.msdn.microsoft.com/For...-166dddf32205/


    All the existing partitions are required by Windows, Windows repair and Vendor recovery. You will use the same efi partition for both Windows & grub/Ubuntu.

    You still manually partition if you want to create a separate /home. I do suggest especially with Windows 8 that you also create a shared NTFS data partition for any data you may want in both systems and set Windows as ReadOnly.

    You will need Boot-Repair to fix the grub issue on chain loading. You should install in UEFI mode, but Boot-Repair will convert a BIOS install to UEFI by unintalling grub-pc and installing grub-efi.
    For more info on UEFI boot install & repair - Regularly Updated :
    http://ubuntuforums.org/showthread.php?t=2147295
    Please use Thread Tools above first post to change to [Solved] when/if answered completely.

  10. #10
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    Apr 2009
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    Question Re: Dual Boot Ubuntu + Windows 8 installation help

    First at all, thank you oldfred for the reply!

    I created the recovery disk with Toshiba Recovery Tool... I think this is the backup of the recovery partition (the last in the image). Am I right?

    Also, I created with Macrium reflect a backup of the boot and msftres partition of the image that I uploaded in my last post..

    Can I delete de recovery partition in the disk (label: Recovery) without affecting Windows OS and the boot of the machine? And then, shrink windows partition?

    What represent the partition with flag msftres and the first partition with Label system in the image of my last post?....

    After all this steps, I proceed to install Linux Ubuntu 12.10 with the ¨Something else option¨ creating the / and /home partitions. Here I would like to know if I need to check the box for install grub or not??
    And as a final step I will execute Boot-Repair with a live CD as you say in your last post....

    ps. sorry for my english...
    Thank you...

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