Comment # 48 on bug 978973 from Mircea Kitsune

I've had this problem myself for many months, and still do with the latest
packages: Instead of the correct images showing, the boot time splash screen is
always a gray background with three green ??? symbols in the center-lower part
of the screen.

Note however that this is not a Nvidia exclusive problem as I think some have
suggested! I have a Radeon card which runs on the RadeonSI architecture, and
get this issue never the less.