Pavilion h8-1128 w/Radion HD 6750: VGA disables DVI!!!

I need to run 2 SAMSUNG monitors of of my h8-1128 that came with an Eyefinity Radion HD6570.
Operating system is Windows 7 Home Premium 64bit.
Both monitors support DVI and VGA inputs. The HD6570 has DVI-I, HDMI, and DisplayPort outputs, and a DVI to VGA dongle.
After looking into cables a bit, I located this cable:
StarTech.com DVIVGAYMM6 6-Feet DVI-I Male to DVI-D Male and HD15 VGA Male Video Splitter Cable
by StarTech
Product Features
Connect a DVI-D and a VGA Monitor simultaneously to a single DVI-I video source
Easy to use and install
Backed by StarTech.com's lifetime warranty
DVI-I Male connector to DVI-D Male and HD15 VGA Male connectors
Connector A 1x DVI-I (29 pin) Male, Connector B 1x VGA (15 pin; High Density D-Sub) Male, 1x DVI-D (25 pin) Male
That appeared to do what I santed by splitting the 6570's DVI connector's digital and analog signals into appropriate connectors.
I connected the cable to the graphics card, then connected the DVI-D male connector to the 1st monitor and verified operation. Next I connected the VGA connector to the 2nd monitor and turned it on. Immediately the DVI connected monitor's screen went black, altho the monitor did not indicate signal loss, and the VGA connected monitor came on & displayed the desktop as the primary monitor!
The screen resolution window only showed the VGA connected monitor as a generic plugNplay monitor. When that same monitor was connected using the DVI->VGA dongle that came with the system the monitor is correctly identified as a SAMSUNG 245BW.
I could not get the screen resolution window to recognize the DVI connected monitor until I disconnected the VGA cable from it's monitor.
Is this expected operation? I thought the VGA analog signaling was independent of the DVI-D signaling?
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Use the DVI->VGA dongle on the 6570's DVI connector with a VGA cable to the monitor that's being shared with the CATV box, then either a HDMI to DVI cable, or a DisplayPort to DVI cable.
You are correct... that would be the way to do it.
Frank
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hi ScoobyDoo,
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Pavilion h8-1128 w/Radion HD 6750: VGA disables DVI!!!

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