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Upgraded my Ubuntu (with dual boot Windows) to 18.04 . After restart I got "System BootOrder not found. Initializing defaults." . Changing the BIOS bootorder to Windows as 1st works, of course, but i want my dual boot option back. I tried the same solution as an Acer user had ("I switched "secure boot"on"). But I don't get the option of "Select an UEFI file as trusted for executing" . Where can I activate those UEFI files, in the BIOS???

Joost Koopman
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If you didn't change the defaults, You are using Grub2 as your bootloader. in this case, please use this command to reconfigure your grub configs.

I assume that os-prober and efibootmgr are installed by default, so:

grub-mkconfig -o /boot/grub/grub.cfg

It will create new grub.cfg file. now reboot your system. Let me know if it solve your problem or not.

Hamid Yousefi
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