plymouth-set-default-theme is missing - trigger dracut problem

[H.-Dirk Schmitt]

I try to migrate to dracut, but plymouth support is broken below ubuntu.
The ubuntu package of plymouth is missing the command 'plymouth-set-default-theme'.
The debian packages are including this file.

As a result, dracut emits the following message

root@vt-xenial-main:~ [1070] # dracut --force
dracut: Executing: /usr/bin/dracut --force
dracut: dracut module 'bootchart' will not be installed, because command '/sbin/bootchartd' could not be found!
dracut: dracut module 'plymouth' will not be installed, because command 'plymouth-set-default-theme' could not be found!
....

If I install a backported package from debian the problem is resolved.

plymouth:
  Installed: 0.9.2-3+~ubuntu16.04.1~c42.ppa1
  Candidate: 0.9.2-3+~ubuntu16.04.1~c42.ppa1
  Version table:
 *** 0.9.2-3+~ubuntu16.04.1~c42.ppa1 500
        500 http://ppa.launchpad.net/dirk-computer42/c42-backport/ubuntu xenial/main i386 Packages
        100 /var/lib/dpkg/status
     0.9.2-3ubuntu13.1 500
        500 http://de.archive.ubuntu.com/ubuntu xenial-updates/main i386 Packages
     0.9.2-3ubuntu13 500
        500 http://de.archive.ubuntu.com/ubuntu xenial/main i386 Packages

ProblemType: Bug
DistroRelease: Ubuntu 16.04
Package: plymouth 0.9.2-3ubuntu13.1
ProcVersionSignature: Ubuntu 4.4.0-24.43-generic 4.4.10
Uname: Linux 4.4.0-24-generic i686
ApportVersion: 2.20.1-0ubuntu2.1
Architecture: i386
Date: Sat Jun 25 21:15:30 2016
DefaultPlymouth: /usr/share/plymouth/themes/ubuntu-gnome-logo/ubuntu-gnome-logo.plymouth
Lsusb:
 Bus 001 Device 002: ID 0627:0001 Adomax Technology Co., Ltd
 Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
 Bus 004 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
 Bus 003 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
 Bus 002 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
MachineType: QEMU Standard PC (i440FX + PIIX, 1996)
ProcCmdLine: BOOT_IMAGE=/boot/vmlinuz-4.4.0-24-generic root=UUID=9b1c6051-dd6e-4a6f-8e00-bdec9fe4cece ro
ProcFB: 0 cirrusdrmfb
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-4.4.0-24-generic root=UUID=9b1c6051-dd6e-4a6f-8e00-bdec9fe4cece ro
SourcePackage: plymouth
TextPlymouth: /usr/share/plymouth/themes/ubuntu-gnome-text/ubuntu-gnome-text.plymouth
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 01/01/2011
dmi.bios.vendor: Bochs
dmi.bios.version: Bochs
dmi.chassis.type: 1
dmi.chassis.vendor: Bochs
dmi.modalias: dmi:bvnBochs:bvrBochs:bd01/01/2011:svnQEMU:pnStandardPC(i440FX+PIIX,1996):pvrpc-i440fx-trusty:cvnBochs:ct1:cvr:
dmi.product.name: Standard PC (i440FX + PIIX, 1996)
dmi.product.version: pc-i440fx-trusty
dmi.sys.vendor: QEMU

[Launchpad Janitor (janitor)]

Status changed to 'Confirmed' because the bug affects multiple users.

[l (tcrfvyguiop)]

This issue can no longer be reproduced with v059-4 and should be closed.

[Benjamin Drung (bdrung)]

Still an issue on oracular:

$ sudo dracut --force -a plymouth --verbose 2>&1 | grep plymouth
dracut[I]: Executing: /usr/bin/dracut --force -a plymouth --verbose
dracut[D]: Module 'plymouth' will not be installed, because command 'plymouth-set-default-theme' could not be found!
dracut[E]: Module 'plymouth' cannot be installed.

[Simon Quigley (tsimonq2)]

I didn't realize there was a bug report for this; it should be fixed in the latest Dracut and Plymouth uploads to Plucky.

FWIW, I still can't get Plymouth to display the theme. I can confirm it works with a Spanish keyboard layout, though. I'll continue working at it.

[Simon Quigley (tsimonq2)]

Here are some further findings...

Running this dracut command in a fully-updated Lubuntu Plucky VM gives me a working encryption passphrase prompt and the Lubuntu Plymouth theme:

sudo dracut --include /etc/alternatives/default.plymouth /etc/alternatives/default.plymouth --include /usr/lib/x86_64-linux-gnu/ /usr/lib/x86_64-linux-gnu/ -f

The first problem I encountered was /etc/alternatives/default.plymouth not being read. /usr/share/plymouth/themes/default.plymouth is a symbolic link to /etc/alternatives/default.plymouth, which on my Lubuntu system points to /usr/share/plymouth/themes/lubuntu-logo/lubuntu-logo.plymouth. /usr/share/plymouth/themes/default.plymouth and /usr/share/plymouth/themes/lubuntu-logo/lubuntu-logo.plymouth were present, but not /etc/alternatives/default.plymouth.

/usr/lib/x86_64-linux-gnu/ is obviously a pretty large hammer. At the very least,
/usr/lib/x86_64-linux-gnu/plymouth/ is needed.

I will get a list of missing .so files, then patch the Plymouth Dracut hook.

[Simon Quigley (tsimonq2)]

With plymouth 24.004.60-2ubuntu3 and dracut-core 105-2ubuntu2, Plymouth theming works out of the box now.

[Launchpad Janitor (janitor)]

This bug was fixed in the package plymouth - 24.004.60-2ubuntu3

---------------
plymouth (24.004.60-2ubuntu3) plucky; urgency=medium

  * Ensure the initrd includes all necessary files for a graphical theme
    (LP: #1596220).

 -- Simon Quigley <email address hidden> Thu, 21 Nov 2024 22:13:38 -0600

[Launchpad Janitor (janitor)]

This bug was fixed in the package dracut - 105-2ubuntu2

---------------
dracut (105-2ubuntu2) plucky; urgency=medium

  * Plymouth hook: Use alternatives instead of plymouth-set-default-theme
    (LP: #1596220).

 -- Simon Quigley <email address hidden> Thu, 21 Nov 2024 14:54:12 -0600