[Bug 1967944] Re: After installing Ubuntu 22.04, no option to boot other installed OSes

[Jeremy Bicha]

This is claimed to be fixed with LP: #1955109 but it didn't seem to work
in my usecase. Maybe it's not actually doing everything it needed to.

** Also affects: grub2 (Ubuntu)
   Importance: Undecided
       Status: New

** Changed in: ubiquity (Ubuntu)
   Importance: Undecided => High

** Changed in: grub2 (Ubuntu)
   Importance: Undecided => High

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https://bugs.launchpad.net/bugs/1967944

Title:
  After installing Ubuntu 22.04, no option to boot other installed OSes

Status in grub2 package in Ubuntu:
  New
Status in ubiquity package in Ubuntu:
  Confirmed

Bug description:
  Test Case 1:
  ------------
  0. Install Windows
  1. Use the latest Ubuntu 22.04 daily image to install Ubuntu

  Expected:
  The boot menu list includes Windows

  What happens instead:
  The system boots directly into Ubuntu without showing the grub screen since Ubuntu is the only available system.

  Test Case 2:
  ------------
  Same as Test Case 1 except I used Fedora 36 Beta instead of Windows

  Other Info:
  ----------
  I did Test Case 2 yesterday in VirtualBox. Sorry I wiped the install because I needed the hard drive space back already. But it's easily reproducible if you have the time to do the 2 installs.

  This issue was also considered important enough to mention at
  https://www.omgubuntu.co.uk/2022/03/ubuntu-22-04-beta-is-now-available-download

  This issue was first announced here:
  https://lists.ubuntu.com/archives/ubuntu-devel/2021-December/041769.html

  A few different options were suggested such as having the Ubuntu
  installer run something like os-prober once during the install only as
  a balance between making dual boot reasonably accessible to our users
  while tightening the system security compared to previous Ubuntu
  releases.

  But as far as I can tell, nothing was actually implemented from that
  discussion. And I guess this workflow has been undertested so far this
  release cycle.

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