See bug #1770966 for someone complaining that they are no longer able to install Ubuntu because this question was removed ( and the automatic choice made to stick with an efi mode install instead of switching to bios mode ).
Also see the hundreds of apport reports that have been filed since 18.04 was released with people booting the installer in EFI mode with an existing bios mode install, and crashing because grub-efi can't be installed without an EFI system partition. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1668148 Title: Warning message when installing in EFI mode to a BIOS disk is horribly confusing To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/partman-efi/+bug/1668148/+subscriptions -- ubuntu-bugs mailing list [email protected] https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
