[Bug 1874066] Re: Cannot install on non-RST drive if RST is enabled and there is a second RST-enabled drive

[Emil Lenngren]

I also got hit by this bug when trying to install Ubuntu 21.04. I want
to install Ubuntu on a separate USB memory I have plugged into my
computer, but couldn't get past this step.

Thankfully ubiquity is written in Python so I could easily in my Live
session go to /usr/lib/ubiquity/plugins/ubi-prepare.py, remove the code
in the should_show_rst_page() method and change it to return the
constant False.

But I'd like to see an option "Continue and install on another disk" if
it is detected that another disk is plugged in that is usable.

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https://bugs.launchpad.net/bugs/1874066

Title:
  Cannot install on non-RST drive if RST is enabled and there is a
  second RST-enabled drive

Status in OEM Priority Project:
  New
Status in ubiquity package in Ubuntu:
  New
Status in ubiquity source package in Focal:
  New

Bug description:
  Test Case:
  1. On a machine with 2 disk 1 spinning disk and 1 nvme disk, enable RST
  2. Start ubiquity and proceed zith the installation to the partitioning step

  Expected result
  Despite RST being enabled, user should be able to install on the non-RST disk

  Actual result
  Installation is blocked on the RST page and user cannot proceed without disabling RST

  ProblemType: Bug
  DistroRelease: Ubuntu 20.04
  Package: ubiquity 20.04.14
  ProcVersionSignature: Ubuntu 5.4.0-25.29-generic 5.4.30
  Uname: Linux 5.4.0-25-generic x86_64
  NonfreeKernelModules: zfs zunicode zavl icp zcommon znvpair
  ApportVersion: 2.20.11-0ubuntu27
  Architecture: amd64
  CasperMD5CheckResult: skip
  CasperVersion: 1.445
  CurrentDesktop: ubuntu:GNOME
  Date: Tue Apr 21 12:35:53 2020
  InstallCmdLine: BOOT_IMAGE=/casper/vmlinuz file=/cdrom/preseed/ubuntu.seed maybe-ubiquity quiet splash nomodeset ---
  LiveMediaBuild: Ubuntu 20.04 LTS "Focal Fossa" - Release amd64 (20200420)
  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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