Ask Ubuntu is a question and answer site for Ubuntu users and developers. Join them; it only takes a minute:

Sign up
Here's how it works:
  1. Anybody can ask a question
  2. Anybody can answer
  3. The best answers are voted up and rise to the top

I'm remastering the ubuntu CD, I've changed some files in the isolinux folder (access.pcx, blank.pcx, gfxboot.cfg) and I have been able to change the first screen (background color to green):

enter image description here

But I can't change the second screen.

I made my own plymouth-theme package, and removed the plymouth-theme-ubuntu-text package. But this standard ubuntu screen is still displayed.

After installation, my own plymouth theme is well displayed.

So, I'm lost, is this screen related to plymouth? (if so, how can it be displayed after removing plymouth-theme-ubuntu-text) Or is it another file to modify?

share|improve this question
Did you solved this problem already? – karlphillip Sep 23 '11 at 19:05

I found my answer in backtrack linux forums. And since I set up the bounty I would like to explain a little bit what my problem was and how it got solved.

I was trying to customize Ubuntu/KUbuntu 10.04 Live CD and I couldn't figure out how to change the splash screen that shows after isolinux.

Changing playmouth theme available on the extracted filesystem.squashfs at /lib/plymouth/themes/ didn't do the trick.

So I found this message stating that the splash screen files used by the Live CD to boot reside in casper/initrd.lz.

So, if you are interested to know how to extract and reconstruct this file, read the end of the section 5.7.1. Quote:

To unpack the initrd.lz file, you need to do this:

# cd extract-cd/casper
# mkdir lztempdir
# cd lztempdir
# lzma -dc -S .lz ../initrd.lz | cpio -imvd --no-absolute-filenames

And to re-create the initrd.lz file:

# cp ../initrd.lz ../inird.lz.orig
# find . | cpio --quiet --dereference -o -H newc | lzma -7 > ../initrd.lz
share|improve this answer
There is no initrd.lz file in Ubuntu 13.04 – Roshan George Jun 23 '13 at 15:36
@RoshanGeorge - there is in 13.10... – Wilf Jan 29 '14 at 22:03

Did you rebuild the initramfs that the liveCD uses when booting the rest of the environment to include your new plymouth theme? I suspect that is the missing step.

share|improve this answer
yep, I'm using uck to remaster the CD, I execute "update-initramfs", and all my other changes (like the "splash.pcx" file that displays the first install menu) are taken into account... – jmehdi Oct 30 '10 at 8:16

The second screenshot shows plymouth, but it is text-mode, not graphical.

You will have to make your own replacement for package plymouth-theme-ubuntu-text. The reason why text mode used is that the installer just plays safe, I guess.

This is also the plymouth that you get after installation when the installed machine has graphics drivers incapable of using kernel mode switching, so I would not suggest removing it.

share|improve this answer

You may want to use this to trigger the right update functions when you change your plymouth theme

sudo update-alternatives --config default.plymouth
share|improve this answer

Your Answer


By posting your answer, you agree to the privacy policy and terms of service.

Not the answer you're looking for? Browse other questions tagged or ask your own question.