Comment 11 for bug 1849100

I'm glad you got it working.

I'd like to understand a little more about your situation...

Is the path to the preseed file?...
.../preseed/kubuntu.seed

What do you mean "generate automatically"?
Does this file exist prior to you making changes, or did you have to create a new preseed file inside Cubic, or did you create the preseed file outside cubic and copy it manually?

What was the contents of the preseed file, that made this work for you?

In the ISOs I've customized, there is always a line, "boot=casper". I wonder why your kubuntu ISO doesn't have this?

If you are able, please share the contents of your grub configuration files prior to your change, and after your change?