Comment # 7 on bug 966255 from Robert Schweikert

Reported by Paul Gonin on ML:

Same issue here with Tumbleweed, updated to 4.4 kernel and LUKS
crypted partition (but not root fortunately)

Symptoms are similar but not exactly the same.
I was able to boot when insisting... but protected partition is not mounted.
Looking at systemd journal I could see that plymouth related issues :
Feb 12 09:30:25 systemd[1]: plymouth-start.service: Main process
exited, code=dumped, status=11/SEGV
Feb 12 09:30:25 audit[1]: SERVICE_START pid=1 uid=0 auid=4294967295
ses=4294967295 msg='unit=plymouth-start comm="systemd"
exe="/usr/lib/systemd/systemd" hostname=? addr=? termi
Feb 12 09:30:25 systemd[1]: plymouth-start.service: Unit entered failed state.
Feb 12 09:30:25 systemd[1]: plymouth-start.service: Failed with result
'core-dump'.

I have had issues with plymouth and luks for dome time actually
https://bugzilla.opensuse.org/show_bug.cgi?id=948975