Hey Benny!

 BP>>> grub is grub :)
 MK>> +1

 MK> no hint with this ?

What hint are you looking for?  I already posted about grub's gfxmode and the kernel's efifb but if more is required I am sure it is doable.  I just need to know what you're looking for.

 BP> why keep the booting process fokus ? :=)

Becuase that is where it starts, although it really isn't an issue as far as linux is concerned.  However I always like to see the right thing happening as soon as the power is switched on.  Now that it is working I am content to move on to better things such as runtime apps.  Having said that mplayer is already working so I can't think of what else might be required as far as 4k monitors are concerned.

 BP> imho vga and mode is needed in kernel boot options

That shouldn't be a problem.  Anyhow I've now tested three different monitors on this setup and they all do the right thing except that a 720p monitor cannot display 16 penguins given the shortage of pixels.  1080p works great with room for 4 more (20 total) in it's native resolution.  4k could use a tad larger consolefont but latarcyrheb-sun32 is readable methinks.  It is what I am seeing as I type this reply.

Life is good,
Maurice

... E¨el by¨ oferleof ‘ghwylcum men.
    Home is very dear to every man.
--- GNU bash, version 5.1.16(1)-release (x86_64-znver1-linux-gnu)