Comment # 3 on bug 1127552 from Thomas Zimmermann

FTR a presentation about this was given at FOSDEM. [1] The display goes from
BIOS logo to login screen. Windows does this and, according to the
presentation, non-technical users expect it to some extend. It requires a
number of changes to the 'boot services' (Grub, kernel console, Plymouth) to
leave the display alone.

I think we should disable it for now until the rest of our stack is ready.
Having garbage on the screen is worse than what we have today. In the longer
term, I wouldn't mind if we support this and maybe we can even make it run-time
configurable.

[1] https://fosdem.org/2019/schedule/event/flickerfree/