[Bug 1870968] Re: system installation reboots to grub prompt with zfs

[Kirt Runolfson]

I used wipefs to wipe partitions before reinstalling to verify steps to
reproduce this bug. I could not recreate the bug afterwards. It could be
an artifact from testing earlier daily iso builds. The installer may not
properly wipe previous filesystems for root on zfs.

I no longer have my ubuntu (sabrent) option as a uefi boot option.

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Title:
  system installation reboots to grub prompt with zfs

Status in ubiquity package in Ubuntu:
  New

Bug description:
  Focal Fossa Beta ISO installation with Root on ZFS as the only thing
  that is special about this installation.

  Installation seemed to proceed without error, but upon reboot the
  system booted to a blank grub prompt. There were no kernel options to
  choose.

  Looks like my UEFI machine choose to boot ubuntu (sabrent) by default.
  If I interrupt the boot process and choose the non-intuitive sabrent
  option then the machine will boot.

  Since there is no mention in the release notes of having to fix an
  issue such as this, post installation, I'm assuming that this is
  unintended behavior.

  Gigabyte B450 I AORUS PRO WIFI-CF Motherboard with an AMD Ryzen 3
  3200G processor and a Sabrent m.2 storage device.

  ProblemType: Bug
  DistroRelease: Ubuntu 20.04
  Package: ubiquity (not installed)
  ProcVersionSignature: Ubuntu 5.4.0-21.25-generic 5.4.27
  Uname: Linux 5.4.0-21-generic x86_64
  NonfreeKernelModules: zfs zunicode zavl icp zcommon znvpair
  ApportVersion: 2.20.11-0ubuntu22
  Architecture: amd64
  CurrentDesktop: ubuntu:GNOME
  Date: Sun Apr  5 10:43:17 2020
  InstallCmdLine: file=/cdrom/preseed/ubuntu.seed initrd=/casper/initrd quiet splash ---
  InstallationDate: Installed on 2020-04-03 (1 days ago)
  InstallationMedia: Ubuntu 20.04 LTS "Focal Fossa" - Beta amd64 (20200402)
  ProcEnviron:
   TERM=xterm-256color
   PATH=(custom, no user)
   XDG_RUNTIME_DIR=<set>
   LANG=en_US.UTF-8
   SHELL=/bin/bash
  SourcePackage: ubiquity
  UpgradeStatus: No upgrade log present (probably fresh install)

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