Are you missing some last piece to make your privacyIDEA experience complete? With the simple privacyIDEA boot splash theme for plymouth, this is now possible.
It is simply derived from the default ubuntu-logo theme and features privacyIDEA icons on a clean white background - Nothing special, but nice. The loading screen on my workstation now looks like this:
You can download the files, including a Readme file here (62kb).