I can confirm, that it affected my system as well (see https://bugs.launchpad.net/ubuntu/+source/grub-installer/+bug/1769732) trying to install on a non-UEFI system. BIOS settings for USB-Boot were set to UEFI-Boot, though.
I changed the settings in BIOS, no need to change anything on the installer (media). The install wizard detects the drives correctly. I still needed to set the mounting pount of sdc (where Ubuntu was to be installed) as well as (important!) the bootloader set to sda. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1767703 Title: Calling 'apt-install grub-efi-amd64-signed' failed To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/grub-installer/+bug/1767703/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
