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I've upgraded my OS to Windows 10 but my problem still persists

I am trying to get Ubuntu 14.04.2 and windows 8.1 dual boot setup. I've read numerous articles on how to do this, but can't figure out what I'm missing.

The latest article I tried to follow had some basic easy to follow instructions and I did everything as described.

I've disabled secure boot and fast startup. I've made sure the ubuntu files partition on the USB is indeed the primary partition. I've tried to install ubuntu several times in the past and every time I've tried a few things differently but it's never worked so far.

The machine restarts, and always loads straight into Windows.

I have a toshiba satellite series (Toshiba C50D-B-12C), if that is needed.

Is it possible to install ubuntu as dual boot on this machine?

Edit: After looking at this answer that states Ubuntu 15.04+ has most issues solved I downloaded 15.04 and tried it with LiLi again, but same as ever, the USB is completely ignored and my machine boots straight into windows.

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iamserious
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6 Answers6

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I have Win8.1 and Ubuntu 14.04 dual booted on a Toshiba S50-B. Here are some things that you should try that worked for me:

  1. Change from UEFI boot to CSM Boot. This is important as the bios will on boot UEFI compatible OSs unless it's in CSM mode.

  2. Change the boot priority to try booting from USB before it tries to boot from HDD or SSD. Otherwise your bios will see the Windows and boot straight to it before checking if there is a USB option.

    Check this Toshiba Guide for a little more info on how to make these changes if you need.

  3. Ensure that you are actually turning your computer off. Usually when you power down a UEFI computer, it goes into a sleep state. On Win8.1 you need to shift click the power button to bring up the option to "Shut Down" your computer.

  4. If none of the above help, try looking at this tutorial that shows how to select a USB to boot from directly from Win8 and Win8.1. I will try to find a similar thing for Win10.

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Eric Power
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For a dual-boot to work, you need to install ubuntu alongside windows. That means that you should install grub (boot loader) in front of windows. You should first boot from a live cd/usb. After installing ubuntu you should try:
1. Boot Repair (GUI) - See this post for more info.
2. From the live cd/usb:
Open a terminal and run these commands:

sudo mkdir /mnt/boot
sudo mount /dev/sdXZ /mnt/boot  # Example: sudo mount /dev/sda6 /mnt/boot
sudo mount /dev/sdXY /mnt  # Example: sudo mount /dev/sda5 /mnt
sudo grub-install --root-directory=/mnt /dev/sdX # Example: sudo grub-install --root-directory=/mnt /dev/sda

If Ubuntu was installed successfully, you will be able to chroot into your real system.

Important: All instances of sdX and sdXY must be replaced with the correct drive/partition for your system. (sda, sdb, sda1, sda5, sdb5, etc). X is the drive letter. Y is the partition number. The first drive is "a" and the first partition is "1". Example: sda1

Only If You Have a Separate /boot partition. If you have a separate /boot partition run these commands. Most users do not have a separate /boot partition and should go to the normal partition section. sdXY is the main partition. sdXZ is the boot partition.

sudo mkdir /mnt/temp /mnt/temp/boot  
sudo mount /dev/sdXY /mnt/temp  # Mount the main Ubuntu partition. Example: sudo mount /dev/sda5 /mnt/temp
sudo mount /dev/sdXZ /mnt/temp/boot  # Mount the /boot partition. Example: sudo mount /dev/sda6 /mnt/temp/boot

Only If You Are Running WUBI (Ubuntu inside Windows) It is possible to chroot into a Wubi install by first mounting your Windows partition, and then mounting the Windows Wubi file, root.disk. The user must determine the value of the Window partition (sda1, sda2, etc). This section only applies to users booting an Ubuntu OS installed within Windows.

sudo mkdir /mnt/windows /mnt/temp  # Make the mount points
sudo mount /dev/sdXY /mnt/windows  # Mount the Windows partition. Example: sudo mount /dev/sda1 /mnt/windows
sudo mount -o loop /mnt/windows/ubuntu/disks/root.disk /mnt/temp  # Mount the root.disk file.

If You Have a Normal Installation. No separate /boot partition, not a Windows/Wubi installation.

sudo mkdir /mnt/temp 
sudo mount /dev/sdXY /mnt/temp  # Example: sudo mount /dev/sda5 /mnt/temp


And then do (in the chroot environment): 

sudo apt-get update
sudo apt-get purge grub grub-pc grub-common
sudo apt-get install grub-common grub-pc
sudo update-grub
exit
theoko
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I had a similar problem on my Acer desktop and Dell laptop. When I shut-down Windows, I could not boot on Linux or a USB drive. The problem is that Windows does not actually shut down, but goes into a hibernate mode. In order to boot to another system, I had to tell Windows to "reboot" and press the boot menu key to choose a boot device. (I was unaware of the shift-power button feature at the time.)

Until Windows does a complete download, the EUFI boot system will not boot to anything but the windows drive.

One word of warning, sometimes when I "rebooted", it triggered automatic updates and the computer was locked up until it finished. This was a serious PITA as I might be trying to leave a remote WIFI location to go home!

Try Shift-Power button (clickable button) and then use your F-x Key to get your BIOS boot menu. Dell is F-12 and I think Acer is F-2. You should see it when you boot the computer.

Buck
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I am not sure what state you are in right now...can you boot the install media? If so, beware that in my experience the 14.04 installers (desktop and server) need patching to be able to install on a UEFI machine. You could check my instruction How to install Ubuntu 14.04 64-bit with a dual-boot RAID 1 partition on an UEFI/GPT system? but ignore the mdadm/RAID parts.

Also, I've read about faulty EFI systems that only call boot managers called /EFI/Microsoft/Boot/bootmgfw.efi. I've read about solutions that replace that file with the grub2 boot loader and chain the Windows boot loader.

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Niclas Börlin
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A workaround would be to make a USB/SD drive that contains grub that boots your Ubuntu install bypassing the windows boot manager. A utility that will help is super Grub2 disk http://www.supergrubdisk.org/super-grub2-disk/

Also if your HDD is formatted with GPT it might have an option to select the Ubuntu boot loader when you go into your boot device menu.

scj643
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UPDATE:

To resolve this known BOOT issue for intel undi pxe-2.1 (build 083) try the solution by ELECTROMAN1 otherwise ensure that your network connection / WIFI is disabled before booting

then download an Ubuntu iso and create a bootable USB using PenDriveLinux for Windows, refer instructions from the link provided

TrevorL
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