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Thread: Dual Boot Ubuntu + Windows 8

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  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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    Re: Dual Boot Ubuntu + Windows 8 installation help

    Quote Originally Posted by tk2013 View Post
    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
    Do you have success in the instalation? I have the same laptop and I will go to install ubuntu 12.10... Can you boot ubuntu?
    Thank You.

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

    As to shutdown: on my HP ProBook, pressing the power switch initiates a normal shutdown instead of a power off. At least, if I am at a text console.

    Again on a text console, 'sudo halt' does everything except power off, and sudo shutdown -h now' does everything including power off.

    Oldfred, what is so bad about power off if all filesystems are already unmounted?

  10. #10
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    Re: Dual Boot Ubuntu + Windows 8

    If file systems are all unmounted you should be ok.

    Best to remember the elephants.

    Never force shutdown your laptop. Use Alt+SysRq R-E-I-S-U-B instead. (For newer laptops they don't bother adding the SysRq print to the key, but it's the same as the PrtScr key)

    Holding down Alt and SysRq (which is the Print Screen key) while slowly typing REISUB
    R-E-I-S-U-B to force shutdown
    A good way to remember it is.
    Raising Skinny Elephants Is Utterly Boring ...or
    Reboot System Even If Ultimately Broken ...LOL.
    http://kember.net/articles/reisub-the-gentle-linux-restart/

    R gives back control of the keyboard, S issues a sync, E sends all processes but init the term signal, I sends all processes but init the kill signal, U mounts all filesystem ro to prevent a fsck at reboot, B reboots the system


    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.

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