Here are some further findings... Running this dracut command in a fully-updated Lubuntu Plucky VM gives me a working encryption passphrase prompt and the Lubuntu Plymouth theme:
sudo dracut --include /etc/alternatives/default.plymouth /etc/alternatives/default.plymouth --include /usr/lib/x86_64-linux-gnu/ /usr/lib/x86_64-linux-gnu/ -f The first problem I encountered was /etc/alternatives/default.plymouth not being read. /usr/share/plymouth/themes/default.plymouth is a symbolic link to /etc/alternatives/default.plymouth, which on my Lubuntu system points to /usr/share/plymouth/themes/lubuntu-logo/lubuntu- logo.plymouth. /usr/share/plymouth/themes/default.plymouth and /usr/share/plymouth/themes/lubuntu-logo/lubuntu-logo.plymouth were present, but not /etc/alternatives/default.plymouth. /usr/lib/x86_64-linux-gnu/ is obviously a pretty large hammer. At the very least, /usr/lib/x86_64-linux-gnu/plymouth/ is needed. I will get a list of missing .so files, then patch the Plymouth Dracut hook. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1596220 Title: plymouth-set-default-theme is missing - trigger dracut problem To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/dracut/+bug/1596220/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
