Multiple External Displays through Thunderbolt Dock G2

[TimGrissom]

I just got my new ZBook Studio x360 G5 workstationwith NVIDIA Quadro P1000 hooked up to my new Thunderbolt Dock G2 with Combo Cable and connected my two monitors to the two DP ports on the docking station.  The laptop's screen is displaying and one of the monitors is displaying but the other is black.  If I unplug the monitor that is working then the other monitor starts displaying but turns off as soon as I reconnect the other screen.  I have rebooted, updated drivers, and all that stuff.

I have spent a rediculous amount of time trying to resolve this,  Any help would be greatly apreciated.

Thanks.

[Huffer]

Exactly which ports are you using on the laptop and the dock to connect the two? I don't have a G2 Tbolt dock and not sure what the Combo Cable is. Is this the device?

https://store.hp.com/us/en/pdp/hp-thunderbolt-dock-120w-g2

[TimGrissom]

This is the dock I am using: https://store.hp.com/us/en/pdp/hp-thunderbolt-dock-g2-with-combo-cable

This is the laptop: http://www8.hp.com/us/en/products/workstations/product-detail.html?oid=23208099&jumpid=reg_r1002_use...

The dock connects to the laptop with a combo cable that is a power adapter and thunderbolt 3 cable joined together.

The two monitors are each attached with a display port to HDMI adapter cable (the monitors only have HDMI) plugged into the display port jacks on the docking station.

I have attached photos of the connections.Combo cable plugged into laptopdisplay port cables plugged into docking station

[Huffer]

Wow you have the Cadillac 230W version I was looking at the ads for the 120W. But I think here is the problem. Alt-DP signal does not do well a lot of times with a DP to HDMI adapter. I see the dock has no HDMI port. I have a Zbook 15 G3 with the older flat type Zbook Thunderbolt dock and I gave up on trying to drive HDMI monitors and just now have a pair of 4K DP connected monitors. The dock has a Thunderbolt port and I use a Tbolt 3 to DP adapter and then the native DP port on the dock. You might have better luck using a USB-C to HDMI adapter like this:

https://www.amazon.com/AmazonBasics-USB-Type-C-HDMI-Adapter/dp/B01M3PTUV6/ref=asc_df_B01M3PTUV6/?tag...

You would connect this adapter to the USB-C port on the dock. This connections uses DisplayLink technology video over USB instead of Alt-DP so the two monitors would be connected through different video channels and both should work, at least that is my theory. 

[TimGrissom]

I have ordered an adapter as you suggested, we will see how that works.

In the meantime, an interesting development, and I swear I already tried this with no luck, but I closed the lid on my laptop and the other screen came up.  I would like to get all three screens working simultaneously but having the two external working is a big improvement from what I was dealing with.

Another interesting discovery.  I use AnyDesk to occasionally log in remotely.  AnyDesk displays a tab for each monitor of the remote computer and when I logged in with it this morning it had three tabs and each one was displaying correctly so the computer knows that it has three screens, it just can't seem to make all of them work together with the current connections.

[TimGrissom]

Update:  I am supposed to receive my adapter later today but this morning I plugged into my dock and all three screens are working.  Apparently, the answer was, "just keep trying until it works."

I think some windows updates installed last night so maybe that had something to do with it.

[Huffer]

I guess we still live in the Age of Miracles. Happy its working.