Comment # 59 on bug 978973 from Michael Chang

(In reply to Roman Bysh from comment #55)
> Michael
> 
> Can the problem exist with dracut? 

Maybe. What about the kernel kms driver (of specific vga adapter) ? As far as I
know plymouth renders via kms backend though I am pretty rust to tell as it may
not be the case.

And when it comes to kms drivers, usually vga= and gfxpayload has nothing to do
with them. Both bootloader parameters are meant to be effective for 'firmware'
based mode setting before kms takes place and takes position of it.