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i'm having a problem regarding booting into Ubuntu, more exactly Grub 2 bootloader, after a Windows 10 installation followed by Ubuntu 16.04, on the same SSD hard-drive, only different partitions. After installing Windows 10 i've disabled Secure Boot from BIOS and hibernation & fast startup from Windows 10. Still, after installing Ubuntu with manually created partitions for root, swap & home, the Grub 2 won't start; still boots into Windows 10. Also, if i'd use EasyBCD in Windows, i can't create Ubuntu option for boot/install Grub. I don't know what i did wrong. There are like 100 tutorials for installing Windows 10 + Ubuntu but it seems that all are mostly the same. Maybe i should select Windows's Boot Manager's partition as Device for Boot loader installation (see the attached picture)? Thanks!

Ubuntu disk manager

EasyBCD EFI error

Windows bootloader

Later edit: after following this steps (https://ubuntuforums.org/showthread.php?t=2291335&p=13341757#post13341757) now i'm able to select Grub2's bootloader at boot, but after booting into Ubuntu, i get some errors (see the 3rd picture). However, if i don't press F12 at boot, it boots into Windows, despide i've put Ubuntu 1st at boot priority in BIOS (first picture).

Ubuntu's options to boot from in BIOS

Grub2 bootloader's options

Errors when booting into Ubuntu

BR4TO92
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2 Answers2

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I have faced the same problem. Solution: Boot into BIOS and go to bootable devices and increase the priority of Ubuntu partition than that of Windows. Save the change and reboot. Now you will see the GRUB boot menu and you should also see boot 'To Windows' option on GRUB menu, if not, then boot into Ubuntu, open terminal and type sudo update-grub it will ask for the password, type in your password and click enter and reboot. Next time it will boot into GRUB and you will also see the Boot into Windows option. Have a nice day.

Ujwal Bhagat
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So the answer was basically oldfred's tutorial to enalbe "trust" on Ubuntu's EFI files for Acer systems and UjwalBhagat advice to reinstall Ubuntu. After a reinstall with internet connection enabled and updates & 3rd party software selected (for install), not it works (i added the new EFI files as "trust" and put the one with grub2 first option for boot), at startup i get the Grub2 bootloader and i can boot into Ubuntu or Windows 10. Thanks guys for your time!

PS: If you know how to mark your comments as answers (oldfred & UjwalBhagat), please let me know.

BR4TO92
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