Interesting tidbits from Cosmic (U18.10), running with `splash` removed from boot arguments (i.e. disable Plymouth splash).
Boot LUKS prompt display: sed: /conf/conf.d/cryptroot: No such file or directory ... (unrelated LVMeta'd warning) /scripts/local-top/cryptroot: line 218: fold: not found Please unlock disk sda3_crypt: Okay, still not clear why yubikey-luks isn't working, but at least there's an error or two now. :-) I then tried both enabling chatty mode (`quiet` removed) and breaking before mount phase in initramfs bringup (`break=premount` added) to do some further digging. The only reference within the as-built initramfs to `/conf/conf.d/cryptroot` anywhere in `/scripts/` is `/scripts/local-top /yubikey-luks`, and that file is noticeably absent from `/conf/conf.d/`. I saw that in bug 317442 (yes, old bug) that there may be situations where this file might not be created. Line 218 of `/scripts/local-top/cryptroot` is the ending of an if-fi block, not clear yet what `fold` references. Net-net, still digging. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1619921 Title: Password Prompt for yubikey not showing in Plymouth To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/yubikey-luks/+bug/1619921/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs