GRUB2 installed to SD card instead of HDD

[Christopher Payne]

GRUB2 installed to my SD card instead of the hard drive. "Entire Disk" install of Xubuntu 18.10 amd64 daily build, BIOS firmware, no option to boot from SD card slot. Xubuntu 18.10 amd64 daily build 07242018.

During installation, Ubiquity by default selected my SD card (/dev/mmcblk0) as the installation target, so I selected my hard drive (/dev/sda) from the pull-down. I clicked Details when installation began, and noticed that it installed GRUB2 to /dev/mmcblk0. After installation, the restart simply brought me to a blank screen with a blinking cursor. Using Super Grub2 Disk to boot in, I ran "sudo grub-install /dev/sda" and it rebooted fine without any help.

I've also had this problem with Linux Mint 18.3 and 19, various Ubuntu-based editions, but not with Fedora 28 Xfce.

ProblemType: Bug
DistroRelease: Ubuntu 18.10
Package: ubiquity (not installed)
ProcVersionSignature: Ubuntu 4.15.0-23.25-generic 4.15.18
Uname: Linux 4.15.0-23-generic x86_64
ApportVersion: 2.20.10-0ubuntu5
Architecture: amd64
Date: Tue Jul 24 12:50:18 2018
InstallCmdLine: file=/cdrom/preseed/xubuntu.seed boot=casper only-ubiquity initrd=/casper/initrd quiet splash ---
InstallationDate: Installed on 2018-07-24 (0 days ago)
InstallationMedia: Xubuntu 18.10 "Cosmic Cuttlefish" - Alpha amd64 (20180724)
ProcEnviron:
 LANGUAGE=en_US
 TERM=xterm-256color
 PATH=(custom, no user)
 LANG=en_US.UTF-8
 SHELL=/bin/bash
SourcePackage: ubiquity
UpgradeStatus: No upgrade log present (probably fresh install)