How do I get 2 Displays with 2 Window managers?

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Hi,

My goal is to be able to create two "displays" not
"screens" running 2 different window managers (one
will actually be just an X-server). I want to run
Gnome on one display (keyboard and mouse) and just an
X-Server (no keyboard and mouse) with no window
manager in the other.

I have tried both a single Matrox G450 Dual-Headed
graphics card and two single ATI Rage Pro 8MB Cards. I
will be happy to get either configuration working. I
have the same results so far with both types of cards.

I am running RedHat Enterprise ES 4. I configured my
xorg.conf file for 2 devices, 2 screens, and 2
monitors and then I created a ServerLayout section.
When I type "startx" Gnome starts on both displays and
my keyboard and mouse control is one display. I was
happy to see this.
I open an xterm and do:

# setenv DISPLAY :0:0
# xterm & (an xterm pops up on one display)
# setenv DISPLAY :0:1
# xterm & (an xterm pops up on the OTHER display)

So, as I understand it, the number before the "." is
the display number and the number after the "." is the
screen number. Apparently I am running two screens and
not two displays. This is why I think this might be a
problem......

Now I have to figure out how to start Gnome or KDE in
one window and have it NOT come up in the other window
(I just want an X server with no window manager in
that 2nd window). I looked in XClients and saw
gnome-session getting called. I had seen some
documentation on the web for gnome-session that said
there was a "-display" parameter that I could pass the
display number. I did not see this in the man page for
"gnome-session" though. Is there a display number
parameter so that I can just start gnome-session one
ONE display? What about for "startkde"? If I can
specify a display number for gnome-session or
startkde, I would think I have to make it so the
displays are ":0:0" and ":1:0", not 0:1 and 0:2, is
that correct?

Thanks,
Todd


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