I decided to install Xubuntu 17.04 today, and if anyone here has an Acer ES1-531 computer (which is what I use), or similar modern Acer that uses UEFI and cannot get Linux to boot after restarting (and the installation process completing) follow these instructions:
- Boot into BIOS. You may be prompted for a password, enter it.
- Enable ‘Secure Boot’ in ‘Boot’ setting if it is not enabled already.
- Go to ‘Security’ and click ‘Select an UEFI file as trusted for executing’.
- (In the case of Ubuntu+GRUB) find HDD0 > ubuntu > shimx64.efi
- Name it something relevant such as ‘Xubuntu’
- Restart, saving changes, and boot back into BIOS
- Push ‘EFI File Boot 0’ to the top of the listing in ‘Boot’ setting.
- You should be able to boot into GRUB.
You can turn Secure Boot off again if you wish to after step 8. It does not remove the additional boot entry that you added.
