[Bug 1975421] [NEW] Make Plymouth hide ALL messages on boot, reboot, halt. Plymouth ignores --no-boot-log flag

[Thomas Weissel]

Public bug reported:

running a fresh install of kubuntu 22.04 
plymouth version: 0.9.5+git20211018-1ubuntu3


What should happen:  
Plymouth should totally cover all bootmessages (no bootmessages should be printed to console in the first place)

What actually happens: 
When Plymouth quits the last 2-3 messages are visible

on shutdown i get:
[OK] Reached target Late Shutdown Services
[OK] Finished System Power Off
[OK] Reached target System Power off


it seems to be absolutely impossible to hide all boot messages 
i've done everything from this arch wiki site (and more) to get a silent boot: https://wiki.archlinux.org/title/silent_boot
(this makes all acpi warnings and more go away.. but the [OK] reached/finished messages are not affected by those kernel parameters (this should also be fixed)

My Kernelparameters: 
fbcon=nodefer rd.systemd.show_status=false vt.global_cursor_default=0 quiet splash loglevel=3 rd.udev.log_level=3


What part of the system throws these messages ? i thought it is systemd? 
so i even edited files in /usr/lib/systemd/system in order to set the StandardOutput to null for all of the halt and reboot and plymouth scripts

and i edited the plymouth start and stop scripts and added -no-boot-log
but plymouth totally ignores this flag and still logs everything to
console and to /var/log/boot.log


this defies the whole purpose of plymouth if plymouth itself spams the console with messages and if it's systemd why doesn't it respect the kernel parameters

** Affects: plymouth (Ubuntu)
     Importance: Undecided
         Status: New

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https://bugs.launchpad.net/bugs/1975421

Title:
  Make Plymouth hide ALL messages on boot, reboot, halt. Plymouth
  ignores --no-boot-log flag

Status in plymouth package in Ubuntu:
  New

Bug description:
  running a fresh install of kubuntu 22.04 
  plymouth version: 0.9.5+git20211018-1ubuntu3

  
  What should happen:  
  Plymouth should totally cover all bootmessages (no bootmessages should be printed to console in the first place)

  What actually happens: 
  When Plymouth quits the last 2-3 messages are visible

  on shutdown i get:
  [OK] Reached target Late Shutdown Services
  [OK] Finished System Power Off
  [OK] Reached target System Power off


  it seems to be absolutely impossible to hide all boot messages 
  i've done everything from this arch wiki site (and more) to get a silent boot: https://wiki.archlinux.org/title/silent_boot
  (this makes all acpi warnings and more go away.. but the [OK] reached/finished messages are not affected by those kernel parameters (this should also be fixed)

  My Kernelparameters: 
  fbcon=nodefer rd.systemd.show_status=false vt.global_cursor_default=0 quiet splash loglevel=3 rd.udev.log_level=3


  What part of the system throws these messages ? i thought it is systemd? 
  so i even edited files in /usr/lib/systemd/system in order to set the StandardOutput to null for all of the halt and reboot and plymouth scripts

  and i edited the plymouth start and stop scripts and added -no-boot-
  log but plymouth totally ignores this flag and still logs everything
  to console and to /var/log/boot.log

  
  this defies the whole purpose of plymouth if plymouth itself spams the console with messages and if it's systemd why doesn't it respect the kernel parameters

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