Public bug reported:
I have a clean installation of Ubuntu 26.04, which is the only operating
system installed on this PC. There is no dual-boot configuration.
GRUB is configured to stay hidden (GRUB_TIMEOUT_STYLE=hidden and
GRUB_TIMEOUT=0), and initially it works correctly.
After some normal shutdowns and reboots, the GRUB menu unexpectedly
appears during boot, even though the configuration has not been changed.
Running the following commands temporarily fixes the problem and hides
the GRUB menu again:
sudo grub-editenv - create
sudo update-grub
However, after some time the problem returns and the GRUB menu is
displayed again.
This happens on a BIOS/Legacy installation using the grub-pc package. I
have not found a reliable way to reproduce the issue every time, but it
has happened repeatedly.
ProblemType: Bug
DistroRelease: Ubuntu 26.04
Package: grub-pc 2.14-2ubuntu2
ProcVersionSignature: Ubuntu 7.0.0-28.28-generic 7.0.12
Uname: Linux 7.0.0-28-generic x86_64
ApportVersion: 2.34.0-0ubuntu2
Architecture: amd64
CasperMD5CheckResult: pass
CurrentDesktop: ubuntu:GNOME
Date: Fri Jul 24 07:43:41 2026
InstallationDate: Installed on 2026-07-17 (7 days ago)
InstallationMedia: Ubuntu 26.04 "Resolute Raccoon" - Release amd64 (20260423.1)
ProcEnviron:
LANG=es_ES.UTF-8
PATH=(custom, no user)
SHELL=/bin/bash
XDG_RUNTIME_DIR=<set>
SourcePackage: grub2
UpgradeStatus: No upgrade log present (probably fresh install)
** Affects: grub2 (Ubuntu)
Importance: Undecided
Status: New
** Tags: amd64 apport-bug resolute wayland-session
** Attachment added: "grub problema.JPG"
https://bugs.launchpad.net/bugs/2161721/+attachment/5986020/+files/grub%20problema.JPG
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https://bugs.launchpad.net/bugs/2161721
Title:
Hidden GRUB menu unexpectedly reappears after shutdown
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