I run 'apropos' and find two programs: rdev and vbetool. But rdev is nowhere to be seen. So I fall back on vbetool. But vbetool does not behave as explained in the man page. But first, to the point. Having at this very moment /dev/ttyN for any N in a high resolution state, I want to have it as I had it under 12.0, which I think is no VESA BIOS mode at all, but normal vga.
To add the line 'vga = normal' in lilo.conf won't do. So I am trying with
$ vbetool vgamode <some_number>
But if I use some_number = -1, which seems to be normal vga, I get:
$ vbetool vgamode -1
Real mode call failed.
Where do I get a list of valid numbers for the argument to vgamode, that is, for some_number?