IIRC, the Indy *only* provides sync-on-green, which
is what confuses
the Sun 13W3-HD15 adapter (it expects composite-sync).
Indy XL and Indigo XZ boards (the ones I have at least) provide
composite sync as well. I "fixed" a Sun 13W3->VGA adapter to work on
the SGI as put forth here:
http://lists.debian.org/debian-mips/2003/debian-mips-200311/msg00013.html
--
Ryan Underwood, <nemesis(a)icequake.net>