Public bug reported:
[Problem]
When running "sudo update-initramfs -u", the plymouth hook script fails with a
"W: plymouth module (...//.so) missing" error if the default plymouth theme has
an underscore in its filename.
[Steps to Reproduce]
1. Install a plymouth theme that has an underscore in its .plymouth filename
(e.g., "hud_space.plymouth").
2. Set this theme as the default using "sudo update-alternatives --install ...".
3. Run "sudo update-initramfs -u".
[Expected Behaviour]
The initramfs should be built successfully, including the "hud_space" theme.
[Actual Behaviour]
The update fails with the warning:
"W: plymouth module (/usr/lib/x86_64-linux-gnu/plymouth//.so) missing, skipping
that theme."
[Workaround]
The bug is bypassed by renaming the theme's directory and files to not include
an underscore (e.g., renaming "hud_space.plymouth" to "kubuntu-logo.plymouth").
This proves the bug is related to the filename parsing and not the theme's
content.
ProblemType: Bug
DistroRelease: Ubuntu 25.04
Package: initramfs-tools 0.147ubuntu1.1
ProcVersionSignature: Ubuntu 6.14.0-34.34-generic 6.14.11
Uname: Linux 6.14.0-34-generic x86_64
ApportVersion: 2.32.0-0ubuntu5.3
Architecture: amd64
CasperMD5CheckResult: unknown
CurrentDesktop: KDE
Date: Thu Oct 30 12:30:46 2025
InstallationDate: Installed on 2025-04-17 (196 days ago)
InstallationMedia: Kubuntu 24.10 "Oracular Oriole" - Release amd64 (20241007.6)
PackageArchitecture: all
SourcePackage: initramfs-tools
UpgradeStatus: Upgraded to plucky on 2025-04-17 (196 days ago)
** Affects: initramfs-tools (Ubuntu)
Importance: Undecided
Status: New
** Tags: amd64 apport-bug plucky wayland-session
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https://bugs.launchpad.net/bugs/2130306
Title:
update-initramfs hook script fails to parse plymouth theme with
underscore in filename
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