plymouth is disabled after upgrade from trusty due to missing "splash" kernel arg

Bug #1572874 reported by Tim Lunn on 2016-04-21
This bug affects 2 people
Affects Status Importance Assigned to Milestone
plymouth (Ubuntu)

Bug Description

I upgraded a mostly clean install of 14.04.4 -> 16.04 (Ubuntu GNOME). Plymouth is never displayed on the upgraded system.

This is due to the grub config not having the "splash" kernel commandline argument currently

ProblemType: Bug
DistroRelease: Ubuntu 16.04
Package: grub2-common 2.02~beta2-36ubuntu3
ProcVersionSignature: Ubuntu 4.4.0-21.37-generic 4.4.6
Uname: Linux 4.4.0-21-generic x86_64
ApportVersion: 2.20.1-0ubuntu2
Architecture: amd64
CurrentDesktop: GNOME
Date: Thu Apr 21 00:47:49 2016
InstallationDate: Installed on 2016-02-25 (55 days ago)
InstallationMedia: Ubuntu-GNOME 14.04.4 LTS "Trusty Tahr" - Release amd64 (20160217.1)
 PATH=(custom, no user)
SourcePackage: grub2
UpgradeStatus: Upgraded to xenial on 2016-04-21 (0 days ago)

Tim Lunn (darkxst) wrote :
Ubuntu QA Website (ubuntuqa) wrote :

This bug has been reported on the Ubuntu ISO testing tracker.

A list of all reports related to this bug can be found here:

tags: added: iso-testing
Martin Pitt (pitti) wrote :

Indeed the default changed with the big plymouth merge in xenial. This should get a postinst to add the flag to the grub config on upgrades.

affects: grub2 (Ubuntu Xenial) → plymouth (Ubuntu Xenial)
Changed in plymouth (Ubuntu Xenial):
milestone: none → xenial-updates
status: New → Triaged
Steve Langasek (vorlon) on 2016-04-22
Changed in plymouth (Ubuntu Xenial):
assignee: nobody → Martin Pitt (pitti)
Martin Pitt (pitti) on 2016-04-22
Changed in plymouth (Ubuntu):
milestone: xenial-updates → none
Martin Pitt (pitti) on 2016-04-25
Changed in plymouth (Ubuntu):
status: Triaged → Invalid
assignee: Martin Pitt (pitti) → nobody
Changed in plymouth (Ubuntu Xenial):
importance: Undecided → Medium
Steve Langasek (vorlon) on 2016-04-25
Changed in plymouth (Ubuntu Xenial):
milestone: xenial-updates → ubuntu-16.04.1
Martin Pitt (pitti) on 2016-04-26
Changed in plymouth (Ubuntu Xenial):
status: Triaged → In Progress
tags: added: upgrade-software-version
Martin Pitt (pitti) wrote :

I installed a standard Ubuntu trusty desktop amd64, and that *does* set the "splash" option in grub by default. Also, if I remove "splash" I don't see the graphical plymouth screen. So in that regard it behaves pretty much exactly like xenial. Does Ubuntu GNOME configure this differently, in the splash theme package perhaps?

Martin Pitt (pitti) wrote :

I was wondering how trusty's plymouth handles the kernel command line, as the "splash" option isn't evaluated in the upstart jobs. It seems this is done in src/main.c, plymouth_should_show_default_splash():

 if (command_line_has_argument (state->kernel_command_line, "splash"))
      ply_trace ("using default splash because kernel command line has option \"splash\"");
      return true;
  ply_trace ("no default splash because kernel command line lacks \"splash\" or \"rhgb\"");
  return false;

This seems to decide between the default (graphical) splash or the text mode where it shows detailed messages. AFAICS, ubuntu-gnome-default-settings does not fundamentally change this.

Martin Pitt (pitti) wrote :

I installed Ubuntu GNOME 14.04.4 amd64, and this also gets "splash" on the kernel command line by default. Are you sure that you didn't manually remove this?

I dist-upgraded this to 16.04 then; this was a bit bumpy (took some apt-get -f installs, but this is unrelated). After that I still had "splash" in the command line, and during boot I see the gray/white double u logo with the blue spinner, which should be the plymouth splash.

So I'm afraid I either cannot reproduce this or I misunderstand what the issue is here.

Changed in plymouth (Ubuntu Xenial):
status: In Progress → Incomplete
Tim Lunn (darkxst) wrote :

No I didnt change it, however like I mentioned on IRC it is possible that vmware is messing with the boot arguments. I will check this over the weekend. I've been away this week. None the less the plymouth splash did work in trusty.

Martin Pitt (pitti) wrote :

> None the less the plymouth splash did work in trusty.

The text or graphical one? I don't see how the graphical one would run without "splash".

Martin Pitt (pitti) on 2016-05-19
Changed in plymouth (Ubuntu Xenial):
milestone: ubuntu-16.04.1 → none
assignee: Martin Pitt (pitti) → nobody
Launchpad Janitor (janitor) wrote :

[Expired for plymouth (Ubuntu Xenial) because there has been no activity for 60 days.]

Changed in plymouth (Ubuntu Xenial):
status: Incomplete → Expired
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