5

When I was running Ubuntu 14.10, I was able to view the verbose output during startup and shutdown (which was very useful for me). But now that I have upgraded to Ubuntu 15.04 I get the verbose output on shutdown, but I only get a purple screen, and then an Ubuntu logo with loading dots which can toggle to a black screen on startup.

In the past to achieve the verbose output on both startup and shutdown I did as follows:

  1. Executed: sudo vim /etc/default/grub
  2. Changed the line GRUB_CMDLINE_LINUX_DEFAULT="quiet splash" to this line GRUB_CMDLINE_LINUX_DEFAULT="splash"
  3. Executed: sudo update-grub
  4. Rebooted

Source

But as this only seems to work on shutdown, how do I get it to also show me the verbose output on startup?

9

Log out of your graphical session and go to TTY1 whith Ctrl+Alt+F1.

Log in and edit the file /etc/default/grub:

sudo nano /etc/default/grub

or if you like vi:

sudo vim /etc/default/grub

Remove the values for GRUB_CMDLINE_LINUX_DEFAULT:

GRUB_CMDLINE_LINUX_DEFAULT=""

Then update GRUB and reboot:

sudo update-grub
sudo reboot
  • That's no help to me. I'm trying to install Ubuntu, and I can't figure out why it won't install because Ubuntu 16.04 defaults to quiet boot /while booting the install CD/. – Phil Goetz Oct 3 '16 at 18:54
2

Change your line to GRUB_CMDLINE_LINUX_DEFAULT="", update grub, and reboot.

1

If you have parameters other than "quiet splash" you can leave them in the line e.g.

sudo gedit /etc/default/grub

GRUB_CMDLINE_LINUX_DEFAULT="quiet splash usbcore.autosuspend=-1"

change to:

GRUB_CMDLINE_LINUX_DEFAULT="usbcore.autosuspend=-1"

The "usbcore.autosuspend=-1" allows me to place the laptop into suspend and hibernate modes - there is more to that than just these lines look here for more: https://help.ubuntu.com/14.04/ubuntu-help/power-hibernate.html

Don't forget to run:

sudo update-grub

after you make the changes to your grub file. Now you will not have a splash screen and you will see all the verbose boot process lines during boot. The process is reversible if you get tired of looking at the boot processes just add

quiet splash

back into the parameters of the same line.

0

For me removing all parameters from GRUB_CMDLINE_LINUX_DEFAULT line causes stop system boot. I have encrypted disk and LVM. In this line I have some parameters that show kernel which partition is encrypted. If you want to show all kernel messages during boot time edit /etc/grub.d/10_linux file and find line

vt_handoff="1"

Change it to

vt_handoff="0"

and update grub config

sudo update-grub

You will have splash screen but if you press F2 button you will see kernel messages.

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