I installed ubuntu MATE 15.10 without grub boot loader, now I want to use grub

Question

I had some drivers issues with standard ubuntu 14.04 so I tried to install ubuntu MATE to virual box in windows 10 first to try it. I liked it so I decided to dual boot it.

Some time age I installed standard ubuntu 14.04 besides windows 10 with grub and then I decided to format partition on which was ubuntu on because I had this drivers problems and hated it. But then I had to restore windows bootloader and it was a pain in the ass.

Last week I installed ubuntu MATE besides windows 10 WITHOUT grub bootloader with the help of this [video]: https://www.youtube.com/watch?v=BLw1bpIFec0 and managed to insert ubuntu MATE partition to boot in windows bootloader with easyBCD.

Everything works now, I like ubuntu MATE so much, that now I want boot directly into it, using grub first and then selecting windows 10 if I really want to boot into windows.

How things work now are like this: When I turn on my laptop it first loads something with windows logo and then prompts me at that windows blue screen if I want to load windows 10 or ubuntu MATE. Then I select ubuntu MATE and laptop restarts and loads into grub first, where I must select if I want to load ubuntu or windows again. After that I get in ubuntu MATE.

Everythign works now, but as I want to mainly use ubuntu now I want so shorted this process so that when I turn on my laptop it first gets me to grub where if I want, I boot into windows.

How can I do this? With this video tutorial which I mentioned, I installed grub to separate 400MB big Ext2 partion. Both OSes are on the same SSD both having 1/2 of capacity of this SSH (120GB both aprox.).

Thanks for help :)

Solution

As a new answer deriving from your comments - reinstall the boot loaders.

First the Windows loader : Boot from the Windows installation media.
When the "Install now" screen appears select "Repair your computer".

Choose "Troubleshoot" then open "Command prompt" and execute :

bootrec.exe /fixboot  
bootrec.exe /rebuildbcd  

Now reboot into Windows installation and disable hibernation and Fast Boot.
To disable hibernation open command prompt as administrator and execute :

powercfg /h off  

To disable Fast Boot open Control Panel (the old version - not the modern design),
select the Energy Settings, enable show hidden settings and uncheck Fast Boot.

After having done this shutdown the machine completely - do NOT reboot !

Now reinstall the GRUB boot loader to your Ubuntu installation in EFI mode.

Boot from the Ubuntu installation media - open a terminal and execute:

    sudo mount /dev/sd*** /mnt
    sudo mount /dev/sd** /mnt/boot/efi
    for i in /dev /dev/pts /proc /sys /run; do sudo mount -B $i /mnt$i; done
    sudo chroot /mnt
    grub-install /dev/sd*
    update-grub  

Note:

sd* = disk | sd** = efi partition | sd*** = system partition

To identify the partition numbers use GParted - it is included in the Ubuntu installation media.

Boot into BIOS and select Ubuntu in UEFI settings to be the default operating system to boot.

Comments

[Matjaž Jerman]

Hmmm, now I deleted ubuntu option in easyBCD but now when I select windows 10 option in grub it doesn't load into it, just some gray screen appears and does nothing. What did it go wrong?

[Matjaž Jerman]

I don't want to use easyBCD anymore. I'll try.

[Matjaž Jerman]

I tried but when I select windows 10, it shows only ubuntu MATE option but when I select this it get's me an error. I think I must repair windows bootloader?

[chaskes]

I would run update-grub again in ubuntu. That really should take care of it and let you choose and boot windows from the grub menu. Let me know.