[Bug 1863434] Re: 20.04 grub menu not visible

[abssorb]

Repeatable on dual-boot. The expected behaviour for dual-boot is that
the grub menu will show.

Whatever process detects dual-boot during reconfiguration of grub is failing as of 20.04.1
grub-mkconfig  ??

This also occurs when using boot-repair, if boot-repair performs a reinstall of grub, then the new config follows the single boot convention and /etc/default/grub option is changed to:
GRUB_TIMEOUT_STYLE=hidden

To solve, manually change this addition back to default GRUB2 setting of:
GRUB_TIMEOUT_STYLE=
which defaults to show, or set explicitly using
GRUB_TIMEOUT_STYLE=menu

then update-grub


This was mentioned in post #23.  Adding this comment to show it's repeatable. If you re-install grub2, then a dual-boot is not recognised.

@Julian Please re-assess. Your comments match only a single boot
install.

-- 
You received this bug notification because you are a member of Ubuntu
Foundations Bugs, which is subscribed to grub2 in Ubuntu.
https://bugs.launchpad.net/bugs/1863434

Title:
  20.04 grub menu not visible

Status in grub2 package in Ubuntu:
  Incomplete

Bug description:
  T430
  Ubuntu MATE 20.04

  New installation.

  After initial boot there is a blank black screen where grub should be visible.
  Grub is functional but not visible.

  ProblemType: Bug
  DistroRelease: Ubuntu 20.04
  Package: grub-common 2.04-1ubuntu18
  ProcVersionSignature: Ubuntu 5.4.0-14.17-generic 5.4.18
  Uname: Linux 5.4.0-14-generic x86_64
  NonfreeKernelModules: nvidia_modeset nvidia
  ApportVersion: 2.20.11-0ubuntu16
  Architecture: amd64
  CurrentDesktop: MATE
  Date: Sat Feb 15 09:19:13 2020
  InstallationDate: Installed on 2020-02-14 (0 days ago)
  InstallationMedia: Ubuntu-MATE 20.04 LTS "Focal Fossa" - Alpha amd64 (20200214)
  ProcEnviron:
   LANGUAGE=en_US
   PATH=(custom, no user)
   XDG_RUNTIME_DIR=<set>
   LANG=en_US.UTF-8
   SHELL=/bin/bash
  SourcePackage: grub2
  UpgradeStatus: No upgrade log present (probably fresh install)

To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/grub2/+bug/1863434/+subscriptions