How can I show or hide boot messages when Ubuntu starts?

  • Is there a way to easily turn on/off showing the boot messages (loading the services) when Ubuntu starts? Is it something in Grub2?

    I am running 10.04.

    For one-time solution (not a permanent change), see https://askubuntu.com/a/25024/250300.

  • You would need to edit the file /etc/default/grub. In this file you'll find an entry called GRUB_CMDLINE_LINUX_DEFAULT. This entry must be edited to control the display of the splash screen.

    The presence of the word splash in this entry enables the splash screen, with condensed text output. Adding quiet as well, results in just the splash screen; which is the default for the desktop edition since 10.04 (Lucid Lynx). In order to enable the "normal" text start up, you would remove both of these.

    So, the default for the desktop, (i.e. splash screen only):

    GRUB_CMDLINE_LINUX_DEFAULT="quiet splash" #Hide text and show splash
    

    For the traditional, text display:

    GRUB_CMDLINE_LINUX_DEFAULT=        #Show text but not the splash
    

    For the splash, but the ability to show the boot messages by pressing Esc:

    GRUB_CMDLINE_LINUX_DEFAULT="splash"
    

    Or, finally, for just a (usually) black screen, try:

    GRUB_CMDLINE_LINUX_DEFAULT=quiet   #Don't show Ubuntu bootup text
    GRUB_CMDLINE_LINUX="console=tty12" #Don't show kernel text
    

    After editing the file, you need to run update-grub.

    sudo update-grub
    

    For more details, see this: https://help.ubuntu.com/community/Grub2

    How can you read that messages that are shown after you removed the `splash` from GRUB_CMDLINE_LINUX_DEFAULT? I can see the messages now when I start, but then X starts and they are gone.

    `GRUB_HIDDEN_TIMEOUT` and `GRUB_TIMEOUT` causes confusion don't understand why they keep two of these settings and displays the error `Warning: Setting GRUB_TIMEOUT to a non-zero value when GRUB_HIDDEN_TIMEOUT is set is no longer supported`

  • I may be out of subject, but you can just press "escape" during boot, to show/hide the plymouth splash screen...

    By "easily turn on/off", I think it's just what he/she wants.

    Does that work on 10.04?

    Yes. I actually tested it on both Lucid Lynx Desktop and Netbook editions before posting :-)

    It works only if grub is not quiet, i.e.: `GRUB_CMDLINE_LINUX_DEFAULT="splash"`

  • There's a simple way of hiding all boot messages. In /etc/default/grub, adjust the following:

    GRUB_TIMEOUT=0 # Do not show the GRUB menu at all
    GRUB_CMDLINE_LINUX_DEFAULT=quiet
    GRUB_CMDLINE_LINUX="console=tty12" # Redirect the kernel output to another tty
    

    After that, just sudo update-grub, and it should be done.

    Doesn't work anymore in 18.04

    `console=ttyS0` does seem to work in 18.04, I found that as answer to my own question. I may do some more research on it later on, though. See https://askubuntu.com/q/1085629/295286

  • You didn't identify whether you are on a server system or desktop, so I'll address both.

    If you add splash to /etc/default/grub/ in GRUB_CMDLINE_LINUX_DEFAULT, Ubuntu will present you with a splash screen, either a simple text based progress bar or graphically via plymouth, which I describe below.

    Using plymouth, a graphical startup animator, you can provide a pretty bootscreen that is well suited to desktop machines. You might not want to do this on a server, but it's up to you.

    sudo apt-get install plymouth-theme-ubuntu-logo
    
  • If you remove quiet option from GRUB_CMDLINE_LINUX_DEFAULT to show boot messages it's sometimes necessary to also set loglevel option to higher value. Otherwise some drivers may flood your tty with notice messages. I use this line to enable boot messages:

    GRUB_CMDLINE_LINUX_DEFAULT="loglevel=4"
    

    This way only significant system messages will be printed to the console.

  • I use GRUB_CMDLINE_LINUX_DEFAULT="noplymouth" to tell my laptop to not show me the startup picture but the boot messages … still works for 11.10

License under CC-BY-SA with attribution


Content dated before 6/26/2020 9:53 AM