Problem viewing Windows acrross extended desktop

[todsweeney]

I have two DGA monitors with an ATI Radeon HD4650 graphics card running from Windows 7 Pro. system.

The monitors are recognised on both the graphics card and diplay/resolution and are connected from a DVI socket on the pc via a 'Y' adaptor, although this results in different displays ie. DVI and VGA. I assume this is not an issue.

My issue is that although the monitors are both set to extended display, the windows will not extend across both monitors.

I have spent some time trolling through the Forum looking for a similar problem, that was resolved, without success.

I hope that someone will be able to assist me.

[redwudz]

I haven't ran W7 for a while, but in my W10 setup, I use 'Clone source' to get the Windows screen on both my displays.
Probably a function of my video card.

'Extend' just shows the background screen on the secondary HDMI display on my setup. I'm using a Nvidia GeForce GT740 Graphics card.

But other members may have some better ideas.

And welcome to our forums.

[pandy]

Afraid that i didn't get you correctly - you have single DVI source connected trough passive splitter to two monitors?

[jagabo]

Analog and digital out on a single DVI-I are usually the same display. Doesn't your graphics card have another output?

[Cornucopia]

Can't tell what those monitors have as port options (model #?), but let's assume they have dvi & vga each.
As jagabo et al said, you shouldn't be using a passive Y cable, doesn't play well in hybrid nor all-digital world.
Only thing I have seen work well that look like that are those proprietary ports that have 2 dvi builtin that pigtail to normal dvi cable ends, but they really only LOOK similar to passive Ys.

That card, IIRC, is supposed to have 2x dp and 1x dvi port. My guess is that you would have no issue if you put each monitor on its own port.
Since dp often has dvi compatible protocol passthrough capability, and dvi ports often have both analog & digital sides active, it would make the most sense to put 1 monitor on the dp port using a dp to dvi adapter cable, then either plug the other monitor directly to dvi, or use a dvi-i to vga adapter and plug in the vga port of the monitor.
Or alternately, get a 2nd dp to dvi adapter cable so that both monitors are plugged in the same way.

Also, remember to use the AMD/ATI Catalyst drivers, not just the generic MS/Win drivers.

Scott

[todsweeney]

Thank you all for your responses to my problem.
I fear that I did not give adequate information, particularly regarding my graphics card, to allow informed responses. However, I am now up and running, my problem resolved by connecting to VGA ports on graphics card and monitor, both devices having DVI-D and AGP ports. My other monitor connected using the DVI-D ports. Whereas previously, the two monitors were connected via the Y splitter. Probably in my dreams, and on an earlier set up, I was able to have the extended capability using the spliiter.
Thanks to Scott in particular, who showed me the alternatives conducive for my set up.