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Unread postPosted: Tue Jan 10, 2012 10:45 am 
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Joined: Tue Apr 25, 2006 9:23 am
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Dear All,
I am currently using Fuel (V12, IRIX 6.5.30m)
with Sony CRT GDM-F520 with VGA (1600x1200 75Hz).

Since the display is getting older, I wanted to try to use the LCD,
Sony LMD-2050W with VGA.
But this display cannot detect the signal from Fuel.
I tried with much lower resolution e.g. 800x600, but still cannot.

I then tried with PC's display Dell's LCD.
The signal could be detected and show the desktop, but very green.

I could not find what I have to install or how to configure,
and why Sony display cannot work.

I would be grateful if anyone could let me have any of your advice.
(Sony service could not provide any information.)

Many thanks.


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Unread postPosted: Tue Jan 10, 2012 11:15 am 
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kamano wrote:
Sony LMD-2050W with VGA.
"with VGA" as in connected to a VGA/HD-15 port on the monitor? Have you tried making a fully digital DVI-to-DVI connection?

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Unread postPosted: Tue Jan 10, 2012 11:36 am 
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I think the V12 uses a technique called Sync-On-Green (SOG). Your display has to be able to process the SOG properly - otherwise you'll see no image on the display.

You might want to read this wiki entry: http://www.nekochan.net/wiki/Monitors_on_SGI_Machines

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Unread postPosted: Wed Jan 11, 2012 12:45 am 
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Thank you very much, tomvos, for your comments.

If I checked the manuals of the displays, SONY GDM-F520 and LMD-2050W,
the setting of Sync-On-Green seems to be the same.
So I still do not know why only the former works.

But, now
if I use the DVI cable both ends (DVI-to-DVI), I can see they worked on Both Sony and even Dell monitors,
as recondas suggested (thank you so much, recondas)

So, does the cable make the difference??
- the cable I have been using is DVI(Fuel)-to-VGA/HD15(display), which came with Fuel.

Many thanks.


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Unread postPosted: Wed Jan 11, 2012 10:36 am 
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kamano wrote:
if I use the DVI cable both ends (DVI-to-DVI), I can see they worked on Both Sony and even Dell monitors,
as recondas suggested (thank you so much, recondas)
You're very welcome.

kamano wrote:
So, does the cable make the difference??
Yes - In as much as it provides a DVI-I compliant connection between your Fuel and monitor. Sync-on-green (and any other quasi-proprietary analog peculiarities your DVI-to-HD15 cable might be wired to provide) aren't an issue if you use a fully compliant DVI-to-DVI connection.
kamano wrote:
- the cable I have been using is DVI(Fuel)-to-VGA/HD15(display), which came with Fuel.
Depending on the original source (SGI or a third party) it might have been intended for a specific Fuel/display combination. You might still be able to use it - if you'd like to try I'd suggest mapping the pin-out with a multi-meter so you can see if the signalling it provides is a match for the HD15 port on the monitor you intend to use.

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Welcome to ARMLand - 0/0x0d00
running...(sherwood-root 0607201829)
* InfiniteReality/Reality Software, IRIX 6.5 Release *
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Unread postPosted: Wed Jan 11, 2012 12:23 pm 
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Joined: Tue Apr 25, 2006 9:23 am
Posts: 23
Thank you so much, once again.
I keep on learning by visiting the forum..
Best wishes.


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