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From: chad@oscar.cs.byu.edu (Chad)
Subject: Re: Using DECstations as X terminals
Reply-To: chad@yvax.byu.edu
Organization: Brigham Young University
Date: Fri, 17 May 91 18:15:42 GMT
Message-ID: <1991May17.181542.19574@hamblin.math.byu.edu>
References:  <1991May17.152824.28173@batcomputer.tn.cornell.edu>
Sender: news@hamblin.math.byu.edu (Usenet News)

--
In article <1991May17.152824.28173@batcomputer.tn.cornell.edu>,
olin@saturn.cheme.cornell.edu (Steve Thompson) writes:
||>I posted a question on this subject a few weeks ago, but I only got
two
|>replies, and both of them seemed to indicate that they mis-understood
|>my
|>question, so here goes again...
|>
|>I have a room with both DECstations and VAXstations. The DECstations
|>are
|>hardly ever used as workstations. I would like the login dialog box
|>that
|>they display to come from our VAXcluster, so that the DECstations may
|>be
|>treated as X terminals. I don't ever want the login dialog box to come
|>from
|>the DECstation. The DECstations would still of course be accessible
|>via set
|>host, telnet, etc. I have had a large number of experiments with
|>different
|>ways to set this up, but with no luck so far. Both DECstations and
|>the
|>cluster run both DECnet and TCP/IP. Does anyone know how to do this?
|>I
|>really really need more VMS seats, and using the DECstations as X
|>terminals
|>will save me from having to buy real X terminals. A solution requiring
|>the
|>user to log into an account on the Ultrix system as an intermediate
|>step is
|>NOT acceptable. Thanks!
|>
|>-steve
|>

I did a simple experiment where I put a comment in the /etc/ttys file of
a DECstation 3100
on the line specifying :0.  I then did a kill -1  1  and then I started
the Xmfb Xserver
program.  This meant that the Xserver was running but no login prompt. 
I then went
to a VAX 3400 VMS5.4-1 system and set the display to the DECstation and
started
the window manager and the session manager.  I also had to tell the
DECstation to allow
the VMS machine to display on it using an appropriate xhost + command.

You could do something similar but start the login process on the VMS
machine.  I haven't
tried that.  You could also just modify the ttys file to start the
Xserver only and xhost + your
vms machine for access privileges to the Xserver.  This I haven't tried.
Experiment!

Good luck


*************************************************************
Chad Leigh 
Brigham Young University / on leave from DEC
chad@yvax.byu.edu /  chad@norge.enet.dec.com
*************************************************************