I have the same problem as many others after installing a fresh Ubuntu 16.04. The fix suggested in all cases I can find online is to select a custom file that will auto load grub. The problem I have is that my BIOS does not offer this option to boot.
The problem is discussed here: Bootable device not found after clean install of Ubuntu 14.04 UEFI
But I have no "Security – Select an UEFI file as trusted for executing"
What can I do to get Ubuntu to start in any way? Is there a way to boot into Ubuntu via startup disk to upgrade BIOS or force grub to auto load?
The laptop model is Acer Aspire ES 15 and also called ES1-533-C0L4
Any help is greatly appreciated.
After several hours I finally found a solution, and I cant believe how mind boggling this was. This is what you should do for your Acer Aspire ES series if you want to install Ubuntu.
The main problem is that the BIOS is preventing you from booting anything up but UEFI compatible systems, such as Ubuntu.
Start BIOS by pressing F2.
Disable Secure Boot and change the order of the boot sequence to boot on USB. (My particular Laptop does not have a CD-ROM drive and requires USB as the only option.)
Boot on USB and select to run Ubuntu in live test mode that allows you to get access to terminal commands.
Open terminal and run
sudo ubiquity -bto run the installation process for Ubuntu.
Select "Something else" to customize your own partitions.
Create the following partitions as a minimum:
/to store the file system
Install Ubuntu and press Continue Testing after installation is over.
Mount newly installed file system into:
(where sda2 is the root partition and sda1 is the efi partition)
sudo modprobe efivars.
Update the installed GRUB:
Move and rename the installed bootloader:
Thanks to Sladek90 for the grub tutorial here: Unable to install Ubuntu on Acer Aspire ES1-533