After I did a boot-repair, http://paste.ubuntu.com/5627076/, I get this message:
Please do not forget to make your BIOS boot on sda2/EFI/ubuntu/shimx64.efi file!
I can go to the BIOS but there is no option about that shimx64.efi
file.
How do I make my BIOS boot on sda2/EFI/ubuntu/shimx64.efi
file?
sudo efibootmgr -v
. (You may need to dosudo apt-get install efibootmgr
first.)