Comment # 63 on bug 1020283 from Martin Wilck

(In reply to Michal Suchanek from comment #61)
> With splash disabled I do not get any graphical screen nor centered prompt.
> The prompt is intermixed with the kernel and systemd messages but when
> typing it is re-displayed at the bottom of the screen.

That's expected, no? The console is shared between the kernel and systemd.
With splash off, we certainly don't want either plymouth or systemd to clear
the screen. AFAICS there's no way for systemd to "know" that some output from
some other source has cluttered the screen. Indeed, as soon as the user types,
the message is re-displayed, which is way better than having to type blindly.

> Issues with plymouth are generally not fixed.

I don't think this is true. SUSE ships plymouth as part of its enterprise
products.