Subject: XFree modeline for DEC VR290 monitor
To: None <netbsd-users@netbsd.org>
From: Matthias Buelow <mkb@mukappabeta.de>
List: netbsd-users
Date: 06/13/2000 03:58:58
Hi,

I'm desperately trying to get an old DEC VR290 monitor I lifted from
the basement to work with XFree (on NetBSD/i386 1.4.2).

The monitor is from a VS3100/m30 (which also runs NetBSD, albeit
headlessly) and it does 1024x864 at 60Hz.  I have crafted a modeline
for XFree/x86 which _almost_ does it, there are two alternative problems
left, though:

* with one setting, the lower 2/3 of the screen are absolutely Ok but the
  upper 1/3 is completely warped (lines get offset oddly, colour doesn't
  match, it doesn't sync properly in these lines)
or
* the entire screen looks almost ok, except that it is horizontally
  shifted by what looks like a sinus-like curve with small amplitude...

I have tried xvidtune excessively, with varying dotclock settings (as long
as the monitor syncs somehow, of course), without improvement over the
situation(s) decribed above. I use a Matrox Mystique220 in the i386 PC,
which supports Option "sync_on_green", as needed by the monitor; this
isn't the problem, imho.

My question is, does anybody have a working XFree modeline for the DEC
VR290 (the backside label says "VR290-D3")? Or any hints on how to resolve
the problem otherwise (short of using a different monitor of course)?

Somebody who's got a working modeline for the beast would really be
my salvation... :)

mkb