Dear SMs,
here comes my summary:
I) My original question:
>I tried to use one of these adapters from male
>13w3-SUN to female 15 HD VGA to attach a SVGA
>multisync monitor to a SUN S-BUS framebuffer.
>
>I read that such a monitor has to support a least
>scanrates of 61.8kHz horizontal and 66Hz / 76Hz vertical
>and composite sync.
>But I tried several of my monitors around (SONY 17se,
>Samsung SyncMaster 17GLsi and 17GLi) which all support
>these scannings and comp. sync and resolution up to
>1280x1024.
>
>I doesn't work. All I see is either a flickering
>or black screen.
>
>Has anybody really practical experiences with connec-
>ting VGA-monitors to SUNs with such adapters and can
>give me a hint what's going wrong here?
II) Thanks to all who responded:
Robert J. Channas <ChannasR@jsc.mil>
Tim Carlson <tim@santafe.edu>
Michael Pavlov <misha@ml.com>
Craig L. Gruneberg <clg@csph.psu.edu>
Glenn Satchell <Glenn.Satchell@uniq.com.au>
Ray Brownrigg <ray@isor.vuw.ac.nz>
Stefan Voss <s.voss@terradata.de>
Russ Poffenberger <poffen@san-jose.ate.slb.com>
Karl von Jena <kvj@ix.netcom.com>
Renny Koshy <renny@qts.com>
F. David Sinn <dsinn@dsinn.seanet.com>
III) The answers:
a) Don't expect the running system to recognize the
change of monitors 'on-the-fly'. You have to reboot
the system.
b) There are two identically-looking models of those
13w3-to-VGA adapters on market, only one does what you expect
it to do. The other one has a screwed up cross-wiring living
inside.
c) Try setting the exact refresh rate and resolution at the
boot prompt with: setenv output-device screen:r1152x900x66
d) Check for bent pins.
e) Even Sun and third parties sell now system whith VGA-monitors
and such adapters, so it really should work.
IV) My comments:
Of course I did recycle the system(s) after connecting the VGA-
monitor, but I forgot to tell. Strange but true: id didn't help.
Some of you even named very common brands and models like
Sony
NEC
NANO (EIZO?)
Nokia
ViewSonic
which all worked with either 13w3-to-HD15 adapters or 13w3-to-
BNC cables.
So I tried again and again... Success at last!
The trick with my monitors seems to be that:
When I attached the monitor to a running system, the internal
processor of the monitor gets screwed up about the strange
sync so it does not recognize the reboot of the machine a
few moments later and the machine does not get in sync with
the monitor. So either attach the monitor to a machine with
power off or wait with switching on the monitor until the ma-
chine comes up after being reset.
Now I even get a 200$ Yakumo 15" multisync running with a SPARC.
Thanks to all of you!
Hans
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