Forcing default (StaticGray) visual under XEmacs

[David Z Maze <dmaze@debian.org>]

My desktop machine at home has two video cards and two monitors.  The
second monitor is old and cheap, and it has a flaky connection on the
blue pin which is now pretty toast.  To try to hack around this, I
set up the second card to run in 8bpp mode with a default StaticGray X
visual.  This works great for things like xterm, which obligingly
display things in shades of, uh, yellow.

For a lot of things I like to do text editing with xemacs; having an
Emacs on the second display feels like a win.  But if I start XEmacs
it's too clever for me: it detects that the display happens to have a
PseudoColor visual available too, and decides to start up using this
visual and a private colormap.  The result is the usual colormap
flickering, made worse by my window manager really failing to deal
properly.

What I really want is a black-and-white XEmacs, for values of "white"
made up by only the red and green signals on the monitor, and without
using a private colormap.  It seems easy enough to force it to use a
private colormap, but I don't want that!  Any hints?

(Things that come to mind: figure out how to make XEmacs DTRT; figure
out how to make XFree86 not report visuals besides StaticGray.  Would
using GrayScale, which has dynamically allocated "colors", work?  Is
the documentation [notably XF86Config-4(5x) and s3virge(4x)] correct
in that the gray visuals are only available at 4 and 8 bpp?)

-- 
David Maze         dmaze@debian.org      http://people.debian.org/~dmaze/
"Theoretical politics is interesting.  Politicking should be illegal."
	-- Abra Mitchell