[Bug 1955109] Re: boot menu not appearing after manual install of jellyfish daily build alongside other OS

[Bob H]

@ Norbert (nrbrtx) 
to overcome this bug, until some sort of fix is applied by the developers:

while logged into Jammy Jellyfish navigate to /etc/default/grub
and add the following line and save:

GRUB_DISABLE_OS_PROBER=false

After the edit, in the console, run:

sudo update-grub

The grub menu will be set up and other operating systems on the device
will be displayed next time the system starts.

(Unfortunately this is viewed as a security problem, which has yet to be
addressed.)

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https://bugs.launchpad.net/bugs/1955109

Title:
  boot menu not appearing after manual install of jellyfish daily build
  alongside other OS

Status in grub-installer package in Ubuntu:
  Confirmed
Status in grub2 package in Ubuntu:
  Confirmed
Status in os-prober package in Ubuntu:
  Confirmed
Status in ubiquity package in Ubuntu:
  Confirmed
Status in grub-installer source package in Jammy:
  Confirmed
Status in grub2 source package in Jammy:
  Confirmed
Status in os-prober source package in Jammy:
  Confirmed
Status in ubiquity source package in Jammy:
  Confirmed

Bug description:
  desktop amd64 PC, UEFI, 8 core processor, 16gb RAM, nVidia graphics
  card, several ssd's

  manual install of Kubuntu Jellyfish to a partition on ssd alongside
  Kubuntu Focal LTS

  I am testing an installation of Kubuntu Jellyfish daily build alongside Kubuntu Focal 20.04.3
  Usually this proceeds without a problem.

  Since the 16th Dec daily build of Jammy, the boot menu does not appear
  any more after installation, also booting ignores Kubuntu Focal and
  proceeds directly to Kubuntu 22.04.

  I recovered the boot menu on this PC by running boot-restore from an
  iso of Kubuntu Focal both Focal and Jelly fish are then available from
  the restored boot menu.

  This bug appears in Kubuntu Jammy after a manual install directly to
  the computer's ssd.

  I'm not an expert at bug reporting, so if this report is incorrectly set out or if more info is needed I'm happy to follow instructions.
  I'll keep an eye on this thread.
  I think the problem is with the Jammy iso, not Focal.

  	
  A boot menu is not created and any other operating systems on the device become invisible to the user. 
  As this is a development version this could be a temporary state of affairs.
  At the very least the user needs to know what will happen and to know this before beginning the installation process.

  
  ProblemType: Bug
  DistroRelease: Ubuntu 20.04
  Package: grub2 (not installed)
  ProcVersionSignature: Ubuntu 5.4.0-91.102-generic 5.4.151
  Uname: Linux 5.4.0-91-generic x86_64
  NonfreeKernelModules: nvidia_modeset nvidia
  ApportVersion: 2.20.11-0ubuntu27.21
  Architecture: amd64
  CasperMD5CheckResult: skip
  CurrentDesktop: KDE
  Date: Fri Dec 17 08:24:04 2021
  InstallationDate: Installed on 2020-10-27 (416 days ago)
  InstallationMedia: Kubuntu 20.04.1 LTS "Focal Fossa" - Release amd64 (20200731)
  SourcePackage: grub2
  UpgradeStatus: No upgrade log present (probably fresh install)

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