I have been toiling away the last week trying to get 14.04 to dual boot on my Sony Vaio Tap 20. This is the method I used to install:

  1. Disable fast boot, disable secure boot
  2. LiveUSB install of Ubuntu with partitions / , /swap, and /home (no boot partition)
  3. Attempted to run boot-repair using:

    sudo add-apt-repository ppa:yannubuntu/boot-repair

    sudo apt-get update

    sudo apt-get install -y boot-repair && (boot-repair &)

then I get this after doing recommended repair:

/usr/share/boot-sav/gui-g2slaunch.sh: line 33: hash: gksudo: not found
/usr/share/boot-sav/gui-g2slaunch.sh: line 35: hash: gksu: not found

  1. Even after going into windows and doing this which didn't help:

    bcdedit /set {bootmgr} path \EFI\ubuntu\grubx64.efi

I think what I need to do is force the windows boot manager to use grub. However, I'm not sure how to do that. Do I mount sda3 (windows efi boot partition) and copy grub over? Such as:

sudo mount -t vfat /dev/sda3 /mnt
sudo cp /mnt/EFI/Boot/bootx64.efi /mnt/EFI/Boot/bootx64.efi.bkp
sudo cp /mnt/EFI/Microsoft/Boot/bootmgfw.efi /mnt/EFI/Microsoft
sudo cp /mnt/EFI/ubuntu/grubx64.efi /mnt/EFI/Boot/bootx64.efi
sudo cp /mnt/EFI/ubuntu/grubx64.efi /mnt/EFI/MicrosoftBoot/bootmgfw.efi
sudo cp /mnt/EFI/ubuntu/grubx64.efi /mnt/EFI/Boot/bootx64.efi.grb
sudo cp /mnt/EFI/ubuntu/grubx64.efi /mnt/EFI/MicrosoftBoot/bootmgfw.efi.grb

Got this from [UEFI still boots directly into Windows 8 instead of GRUB]: http://ubuntuforums.org/showthread.php?t=2101840

Not sure why boot-repair doesn't work. Any ideas? I realize there are a million variations on this question, however, also wondering if I should just reinstall but make a /boot partition during install to save the trouble.

It is very frustrating that boot-repair does not work.


So, I have another question for how to go about manually moving the Grub boot manager. When I installed ubuntu, I did not specify a /boot partition. However, will the installer have installed the grub boot manager package? The reason I ask is, the windows boot manager will be in sda3, however, the ubuntu boot manager will not have installed to that partition, under which partition would it have installed? My / partition? (that looks odd, but out of the three, "/" , "/swap" and "/home" that is the one I mean) I'll need to mount both sda3 and the partition with ubuntu in order to copy grub over. It has been years since I did any serious linux work and back then I used a sun system.


When I had the same problem I used to press F2 and the windows boot manager allowed me to chose the Grub and then Ubuntu. Try all the Fcommands and c if that works for you. You don't need to disable secure boot as Ubuntu is recognised by your Bios as asecure OS

Your Answer

By clicking “Post Your Answer”, you agree to our terms of service, privacy policy and cookie policy

Not the answer you're looking for? Browse other questions tagged or ask your own question.