Ubuntu – Trying to dual boot Ubuntu 14.10 with Windows 10, last one not detected

dual-bootgrub2

I have a laptop, and I'm going to install Ubuntu (I have experience, and I have successfully installed Arch Linux, Ubuntu, Fedora, Debian, Xubuntu, Kubuntu, Manjaro Linux, etc.), but installing Ubuntu 14.10 (Utopic Unicorn) alongside Windows 10, Ubuntu can't detect Windows.

It shows me like there's no OS, but I have Windows 10.

I have two primary partitions by the way if I manually install. If the Ubuntu installer can't detect Windows 10, will it be detected at GRUB?

Best Answer

  • I wasn't able to get the boot repair to work so I manually added a Windows 10 boot option.

    The first step is to edit /etc/grub.d/40_custom (using SUDO) and add the following lines to the bottom of the file:

    menuentry 'Windows 10' {
    set root='(hd0,msdos1)'
    chainloader +1
    }
    

    In this case my bootloader was in /dev/sda1 hence the 1 at the end of msdos. After this run sudo update-grub2 and you should be good to go.

    Worked for me, advice taken from here: http://technologytales.com/2010/11/21/manually-adding-an-entry-for-windows-7-to-an-ubuntu-grub2-menu/