Clean Install of 18.04 Boots to Grub Prompt
I was able to solve mine (though I was using EFI and not legacy) by booting from the install thumb drive, selecting rescue mode, and re-installing grub on /dev/sda.
I was able to solve mine (though I was using EFI and not legacy) by booting from the install thumb drive, selecting rescue mode, and re-installing grub on /dev/sda.