Forgot to mention, I'm using HP 2012 230W docking station.
My system has the latest BIOS (came with it from factory).
You need to have external 2 displays to be connected via native Display Port.
You will be able to turn on all three than.
I'm getting the same problem however I've got a HP 6570B laptop.
Is there any resolution to this problem yet?
I am also have a Probook 6445b and having the same issue. Previously, I had a Probook 6445b with two HP Compaq LA2006x monitors connected; one monitor connected directly and the second via an HP USB Graphics Adapter (model # NL571AA). Upon attempting to configure the monitors in the same way with my 6445b, my laptop crashes presenting the 'blue' screen. When I attempt to connect without the adapter, the computer appears to see the 3rd monitor but will not connect. Any advice would be greatly appreciated.
Wanted to throw in my two cents on this and see if anyone has resolved the issue. I recently started as the new "IT guy" for a company and cannot get this same setup to work with two workstations that I rebuilt however I have 4 others with the exact same config and it works. Here is what I know:
The stations that work have the following setup:
Driver Revision Date: Dec 2012 (don't know where to find this)
(2) display port to DVI on docking station
(1) VGA on docking station
I believe the VGA needed because of the low frequency however the latest drivers from HP install version 184.108.40.20612 that has a date of April 2012, not Dec 2012 like the working stations have.
Win7 picks up the 3 monitor however nothing will display. I have forced the monitor to VGA input on the display that won't work.
I'm at a loss, did anyone figure this out?
Did you ever figure this out?