Ubuntu 18.04 booting from USB problem

[Borko1]

Hello.
So, yesterday I downloaded Ubuntu 18.04 ISO file and then copied the files to the USB Drive by Rufus. Then, I restarted my PC and on the boot menu I had 2 options, UEFI Kingston or just Kingston USB, without that UEFI prefix. I choose the first option, UEFI. It booted successfully, but there was a problem at the end of the installation of Ubuntu: "grub-efi-amd64-signed installation failed". Then I searched forums on the internet and found something, the people said that I need to choose the 2nd option, without UEFI prefix and to turn off ACPI. I choose that, and then problems started. I won't say anything more, I'll put a video there, I can't explain this. I can just say that I tried to turn ACPI off, the errors disappeared but when I tried to install it, the purple screen freezed. Thanks in advance.

Video: https://www.youtube.com/watch?v=5IhwlIKyE8Q&feature=youtu.be

 

[Dave8671]

What brand and model is this system which will help more?

If you ever see split screen on a boot up stop something is wrong that should not occur.

It could be a bad installer burn to test this reburn a new download of ubuntu. Since you installed the ubuntu to the drive partly and due to the error efi grub. That why the system is acting the way it is.

Do not change from efi to non efi after you install an operating system. There is a efi parition now on the disk which has incorrectly configured grub

In order to change the to a non efi you must first reformat hard drive. Than select Kingston USB. Its easier to reformat than repair the partition. If you get acpi error with the non efi re-enabled it in BIOS. if you get a live session and have internet access install gparted. This is a good idea of how to use gparted.

View: https://m.youtube.com/watch?v=BApOh31NSXs