svgalib no doubt requires the ability to access direct
hardware or somesuch to draw graphics on a tty, and only
then a VGA one (serial terminal won't work). There's no
way that screen could handle that situation. At that
point you want remote X Windows.
Which svgalib does do, writing to my real (unused) tty
console #3 when I'm in a screen -- this is all local, btw --
and I want to look at some jpegs, etc. (there are still
issues when I happen to be in another terminal somewhere
else when svgalib wants to show me that pic, after loading
it).
What I'm really asking here, I guess, is: what's stopping me
from using e.g. mplayer -- with svgalib -- the same way,
from any screen, but to show me a movie? mplayer actually
starts to write to terminal #3 (then it tried #4 the next
time?!), but bails out with the error:
ioctl(VT_WAITACTIVE): Operation not permitted
There's some vt/screen skullduggery going on here...
Maybe NoMachine NX will better suit your purpose.
¿Qué?
NX from NoMachine is like a screen for X windows. Though after you
provided more information, this is probably not what you want.