I have an Ubuntu 16.04 running in my laptop. I want to upgrade to 18.04, so I burnt a DVD with 18.04 ISO image and when I load the DVD and open the boot menu using F2 I could only see something like Ubuntu(ST ...)
I can't find DVD. So I researched the internet and found that I need to enable Legacy instead of UEFI and also keep Legacy first in BIOS. So when I load the DVD and open boot menu, I can see DVD but when I press Enter a message pops in black screen and the DVD doesn't boot with 18.04
This is the message that pops up.
