Can't Configure Six Monitor Array: Hardware or Software?

[Ben85]

Hi Everyone,

As per the thread title, I'm attempting to configure a six monitor array (three of which are connected via DisplayLink), but haven't been having much luck.

The following hardware is being used:

DisplayLink Adapter: HP NL571AA
Laptop: HP EliteBook 8760W
Laptop Dock: HP NZ223AA
Monitors: Samsung MD230X6
Video Card: AMD FirePro M5950

The following software is being used:

DisplayLink Driver: 7.5.52874.0 + 7.5.52889.0
Operating System: Windows 7 Ultimate x64 SP1
USB 3.0 Driver: 2.1.39.0
Video Card Driver: 13.152.4-130928a-164146C-HP

The six monitor array is connected as follows:

Top Left: Samsung MD230 -> DVI -> HP NL571AA -> USB -> HP NZ223AA
Top Middle: Samsung MD230 -> DVI -> HP NL571AA -> USB -> HP NZ223AA
Top Right: Samsung MD230 -> DVI -> HP NL571AA -> USB -> HP NZ223AA
Bottom Left: Samsung MD230 -> DVI -> HP NZ223AA
Bottom Middle: Samsung MD320 -> DisplayPort -> HP EliteBook 8760W
Bottom Right: Samsung MD230 -> DVI -> HP NZ223AA

In other words, the bottom array (which works flawlessly) is using native video outputs (i.e. DisplayPort and DVI) and the top array is using DisplayLink.

When the HP NL571AA adapters are connected in isolation (i.e. without the monitors attached), device manager lists all three of them under "USB Display Adapters" and they appear to be working correctly. However, once the monitors are attached, it goes pear-shaped. Using a previous AMD driver, an "atikmdag.sys" BSOD would usually result (this doesn't happen using the recent AMD driver). Regardless of the AMD driver version, upon restarting the operating system, two of the three HP NL571AA adapters will be shown as an "Unknown Device" in the device manager.

I've attached the advanced debug information. Hopefully, this might assist in determining if the issues are due to faulty hardware or software incompatibilities.

If you require any further information, please be sure to let me know.