I think this is likely VM setup: I have installed a new system with the 20170919 image (a Thinkpad T450p), and the plymouth screen responds correctly. I will try to reproduce this in a VM here.
** Changed in: plymouth (Ubuntu) Status: New => Incomplete -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1715490 Title: pretty version of plymouth won't accept passphrase To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/plymouth/+bug/1715490/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs