[Bug 1970995] Re: grub not installed to selected location

[oldfred]

Duplicate of this bug which never was fixed & still applies to every version using Ubiquity installer. Bug has multiple work arounds, but still needs fix.
https://bugs.launchpad.net/ubuntu/+source/ubiquity/+bug/1396379

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https://bugs.launchpad.net/bugs/1970995

Title:
  grub not installed to selected location

Status in ubiquity package in Ubuntu:
  Confirmed

Bug description:
  When installing Xubuntu to a USB drive, grub was installed to the
  computer's hard drive rather than the USB as selected.

  I attempted to install Xubuntu 22.04 on a USB drive by using the
  "Something else" installation option. Booted into a Xubuntu 22.04 live
  USB (/dev/sda) using UEFI boot. I created an EFI system partition
  (250MB), a swap partition (4000MB), and a root partition (the
  remaining 120000-ish MB) on the destination USB drive (/dev/sdb). I
  also selected the destination USB (/dev/sdb) in the "Device for loader
  installation:" drop down (please see attached screenshot). I have used
  this configuration successfully for several Xubuntu 20.04 installs, so
  I have no reason to believe there is an issue with these
  options/configuration.

  The installation completes normally, and there does not appear to be
  an issue as the system will reboot into the USB drive (/dev/sdb during
  installation), but the computer will not boot correctly if the USB
  drive is removed, and the USB cannot be booted from on another
  computer. It appears that grub was at least partially installed on the
  computer hard drive (/dev/nvme0n1 in my case). /dev/nvme0n1 contains a
  factory Windows 11 install and a Xubuntu 20.04 install, if that is
  relevant.

  In 20.04, this processes resulted in a USB drive that could be booted
  from on any computer using UEFI booting while leaving the computer
  hard drive alone. This appears to no longer be the case with 22.04.

  This is my first bug submission, so please let me know if I failed to
  correctly submit this bug or if additional information is needed.

  ProblemType: Bug
  DistroRelease: Ubuntu 22.04
  Package: ubiquity (not installed)
  ProcVersionSignature: Ubuntu 5.15.0-27.28-generic 5.15.30
  Uname: Linux 5.15.0-27-generic x86_64
  ApportVersion: 2.20.11-0ubuntu82
  Architecture: amd64
  CasperMD5CheckResult: pass
  CurrentDesktop: XFCE
  Date: Fri Apr 29 14:08:08 2022
  InstallCmdLine: BOOT_IMAGE=/casper/vmlinuz file=/cdrom/preseed/xubuntu.seed maybe-ubiquity quiet splash ---
  InstallationDate: Installed on 2022-04-29 (0 days ago)
  InstallationMedia: Xubuntu 22.04 LTS "Jammy Jellyfish" - Release amd64 (20220419)
  SourcePackage: ubiquity
  UpgradeStatus: No upgrade log present (probably fresh install)

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