[AG-TECH] video only shows on primary display

Osland, CD (Chris) C.D.Osland at rl.ac.uk
Mon Apr 22 10:36:32 CDT 2002

Oh - another piece of info.  While the G200 shows up as
multiple screens under the Advanced tab, at least for me the
G450 showed as a single screen that you could set up as 2048
(or more) wide.  The net result is much the same (the first
1024 pixel columns come out of the first socket, the next out
of the second) but it looks different in the software.



Chris Osland                         Office tel: +44 (0) 1235 446565
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-----Original Message-----
From: Allan Spale [mailto:aspale at evl.uic.edu]
Sent: 22 April 2002 15:59
To: Stewart Macneill
Cc: ag-tech at mcs.anl.gov
Subject: Re: [AG-TECH] video only shows on primary display


As a future reference, though this probably will not apply in your case
since your video card is not recognized, but always make sure to have the
same color depth selected for all your displays.  Otherwise, video will
show up fine in one display, and then disappear in another display.

One thing to make sure of is that multiple displays are enabled.  This can
be done by opening up Display Properties and pressing the Advanced button.
A Matrox dialog will appear.  Press the DualHead tab and select the option
DualHead Multi-Display.  Even though you may have already done this, it is
possible that one of the sections of the Matrox dialog will be of use.

EVL uses two Matrox G450 cards (one AGP and one PCI) on our display
machine. We used to have one G200, but after Windows 2000 we noticed
performance hit (probably related to the driver), so we switched to our
current setup. 

I hope this information helps you come up with ideas for how to have your
displays work properly.


On Mon, 22 Apr 2002, Stewart Macneill wrote:

> Hi all
> Just in the process of coaxing our node into life.  I've got the standard
> G450 AGP and G200 PCI configuration set up on a dual CPU IBM
> but have a problem in that the video from my cameras only shows up in the
> primary display.  
> It doesn't seem to matter whether the primary display is set to the LCD
> monitor or a projector, PCI or AGP, as soon as I drag the Vic window onto
> one of the other displays, the feed is lost - if I minimize and restore
> the window just picks up whatever is behind it.  If I move it back into
> primary display, I see the video again.
> The only two oddities I have noticed are that W2K Advanced Server (display
> machine) only reports one of the G450 heads in the Matrox window control
> panel,  and the capture computer (also a dual CPU IntelliStation, Red Hat
> 7.2) reports that it can't find a monitor list and is using the 'main'
> display.  I don't know if that is at all significant.
> Has anyone come across this problem?    I had a search through the AG-Tech
> archives, but didn't find anything.
> Thanks for any suggestions.
> Stewart
> Stewart D Macneill
> NeSC Systems Manager (Glasgow)
> University of Glasgow
> Dept of Computing Science
> 17 Lilybank Gardens
> G12 8RZ
> Tel:  0141 330 3102 (direct)
> Fax: 0141 330 4913
> email: macneisd at dcs.gla.ac.uk <mailto:macneisd at dcs.gla.ac.uk>

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