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From: Nicola Girardi <ng@0x80.stream>
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X-Bullshit: framework-aware rich-client frontend 
Subject: Re: [9front] Screen resolution
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Quoting Nicola Girardi <ng@0x80.stream>:
[snip]
> My suspicion is that I need to add an entry to /lib/vgadb but
> I can't figure out what the entry should look like.  (The command
> above, I think, is the same command I used to get 4K to work in some
> other computer in the past; I didn't need to touch /lib/vgadb then.)

Some more guesswork.  /lib/vgadb:/0166/ makes me think the controller
entry is already present.  Perhaps then I need an entry describing the
monitor?  I guessed the edid output could be used here, so I added

mymon=3840x2160@30Hz 
		clock=297
		shb=4016 ehb=4104 ht=4400
		vrs=2168 vre=2178 vt=2250
		hsync=+ vsync=+ 

@{ rfork n; aux/realemu; aux/vga -m mymon -l 3840x2160@30Hz }

But again black screen.