I've got Ubuntu 10.04 installed on a computer and I am trying to do a fresh install of 12.04. I never had problems booting from a USB stick on it before and USB is setup as the first boot order in BIOS.
According to BIOS the USB stick is recognized at boot on the computer. And the USB stick works on another desktop computer I have tested it on.
Since I already have Ubuntu installed and I can access GRUB command line just after rebooting. Is there anyway I can manually get it to boot the USB stick from the GRUB command line or something similar?
I've tried both Startup Disk Creator and UNetbootin.