Yes, it shows both monitors.  main (Vegas pro display as #1, and my second as #2

The .NET Framework 4.6.2 thing seems to be just for Windows 7.

It could be a Nvidia driver issue. What driver version are you running? megabit has trouble with 376.33 in this post (although he has 2 of them).

Set Optimize GPU display performance to OFF.

Nick, I am running the latest driver 378.78.

Jam_One, un-checked the GPU display performance to OFF, but no luck.  still NO preview on second monitor???

The strangest thing is when I run V13, all works ????

Perhaps it's a .NET Framework issue. That's one difference between 13 and 14. Maybe try section 13 of this. But probably more likely to be Nvidia driver. I have been recommending 376.33 recently in most cases but in light of megabit's problems with that driver and your card, maybe you could try 372.90 first.

Have you tried Driver 372.90 ? .. that one seemed to cure other problems with VP14.

Very frustrating. Tried the CUDA toolkit install, no help... then installed 372.90 no help...

Maybe you can follow up on this thread to see if anyone using the GTX 1080 has the same problem? Something is surely going wrong on your system when using VP14 for this not to work.

https://www.vegascreativesoftware.info/us/forum/vp-13-super-fast-with-a-gtx-1080-gpu-acceleration--103043/

Paul, I put in a ticket with Magix to see if they have any suggestions. Will follow up once I receive some answers.

I have a similar problem, but for me the preview is working when Vegas is on the primary Windows display and the preview display is on the secondary Windows display (primary and secondary for Windows, not necessarely for Vegas). I discussed my topic in https://www.vegascreativesoftware.info/us/forum/video-preview-on-main-display-only--105250/ and I opened a ticket to Magix, but without solution. Is your case like mine?

Alessandro

This could well be a Windows issue too. There is no place anywhere in Windows to set the monitor identification number. It might help to play around with exchanging the ports in relation to the monitors (swap the cables) to get Windows and Vegas identification numbers aligned. I do remember having that issue with the two R9 290 cards in my system too. The preview would constantly overlay over the actual Vegas window although I selected the second monitor for preview. I tried to get this sorted with MS too but they just refused to understand the problem. It get's worse when you use a third monitor only "occasionally" for preview. The time the third monitor is not connected, the preview is half across the remaining two monitors. I would put the blame on both MS and Vegas; one not being flexible and the other no reading the monitor settings correctly.

Oldsmoke, I think you are onto something.

I have been playing with switching the monitors, by plugging them into different ports and now when I put the main V14 screen on the right monitor and my select preview to 1st monitor, the preview shows up on the left monitor.  However if I put the main sreen on the right side I am unable to get preview onto the right monitor. It seems to be somewhat Windows related. Need to play with it some more. What seems to be key is that Windows reports the screens as  2  1     and V14 shows them as   1  2. 

What seems to be key is that Windows reports the screens as  2  1     and V14 shows them as   1  2. 

I feel your pain and there is no way for the user to have some influence in this matter. There have been plenty of discussions and request for Microsoft to give the end user access to the monitor identification numbers but MS doesn't see that there is a problem. It also seems that either the API information that MS provides is wrong or Vegas is reading it wrongly. In addition, the card manufacturer don't tell which port on the card is the primary port, the one the bios will detect as such. I played with it a long time ago and googled many places.

... There is no place anywhere in Windows to set the monitor identification number.

With nVidia card it is within nVidia driver.

... In addition, the card manufacturer don't tell which port on the card is the primary port, the one the bios will detect as such.

The precedence sequence is supposed to go in accordance with "the age of the protocol" with every newer socket becoming the-last-in-the-line:

VGA ---> DVI ---> Display Port

... There is no place anywhere in Windows to set the monitor identification number.

With nVidia card it is within nVidia driver.

So how do change number ID1 to ID2? Note, number not position and do that system wide!

... In addition, the card manufacturer don't tell which port on the card is the primary port, the one the bios will detect as such.

The precedence sequence is supposed to go in accordance with "the age of the protocol" with every newer socket becoming the-last-in-the-line:

VGA ---> DVI ---> Display Port

Even my old GTX580 has 2x DVI and 1x HDMI and no, the HDMI is not port 1. FirePro would have display ports only, what then?

CorTed , a couple of questions, just in case:

1) You have installed all appropriate drivers to the Monitors? (It's not about video card's drivers. Monitors' drivers with their ICC color profiles.) They are listed in Device Manager with no signs of conflicts?
2) There are NO Generic P-n-P Monitors listed in your Device Manager?

-------------------------------------------------

In any multi-monitor configuration you absolutely should not allow this to recede in your system:

Every "screen" absolutely has to have its proper name and its proper drivers installed. TV either.
TV also has to have its drivers installed and its name written in the Device Manager. All modern TVs which are suitable for monitoring and connect via HDMI are supposed to have their respective drivers either on a disk or on the manufacturer's site. Those drivers can be installed either directly by their Installer/Setup, or indirectly via the Device Manager with the Update Driver function of the "screen's" entry in DM. In case there is no "Setup / Install" thing in the driver's folder. Click on the "screen's" entry --> Driver --> Update --> Manual Search --> browse to the folder with the driver.

There was a previous case of this issue here: https://www.vegascreativesoftware.info/us/forum/vegas-pro-14-dual-monitoring-does-not-work-black-screen-etc--104075/

CorTed , a couple of questions, just in case:

1) You have installed all appropriate drivers to the Monitors? (It's not about video card's drivers. Monitors' drivers with their ICC color profiles.) They are listed in Device Manager with no signs of conflicts?
2) There are NO Generic P-n-P Monitors listed in your Device Manager?

-------------------------------------------------

In any multi-monitor configuration you absolutely should not allow this to recede in your system:

Every "screen" absolutely has to have its proper name and its proper drivers installed. TV either.
TV also has to have its drivers installed and its name written in the Device Manager. All modern TVs which are suitable for monitoring and connect via HDMI are supposed to have their respective drivers either on a disk or on the manufacturer's site. Those drivers can be installed either directly by their Installer/Setup, or indirectly via the Device Manager with the Update Driver function of the "screen's" entry in DM. In case there is no "Setup / Install" thing in the driver's folder. Click on the "screen's" entry --> Driver --> Update --> Manual Search --> browse to the folder with the driver.

 

Sorry, but none of what you are saying has anything todo with the OPs issue. Monitors very well CAN by Generic. The only thing a monitor driver will do is map the monitor hardware it to a proper name and some install ICC profiles, that's it. Ev3en my Surface Pro screen is identified as generic and I use it in combination with 2x 27" Dell Ultrasharp without any issue in any software including SVP13 which I recently installed on it.

Again, most likely the issue is related to monitor numbers which cant be changed in the OS or in Vegas. 

My ASUS PB287Q monitors do not have specific drivers that I can find, Seems OldSmoke is correct. The only way for me to make this work now is to have the V14 on the right screen (#2 in my case) and set preview to  left screen (#1). Selecting preview will use #1 screen.  If I change this within V14 to switch monitors it does not work. 

My ASUS PB287Q monitors do not have specific drivers that I can find, Seems OldSmoke is correct. The only way for me to make this work now is to have the V14 on the right screen (#2 in my case) and set preview to  left screen (#1). Selecting preview will use #1 screen.  If I change this within V14 to switch monitors it does not work. 

I know this is a pain but here is what I would try:

Restart the PC and note on which monitor the bios messages pop up; that "should" be your main monitor

1. Shutdown the PC
2. Unplug all monitors and plug your "main monitor" in the same port the bios messages popped up; leave the rest disconnected.
3. Boot into Windows
4. Open the Device Manager, go to the top menu >View>Show Hidden Devices
5. If you see hidden monitors, delete all. Don't delete the main monitor.
6. Shut down the PC.
7. Plug the next monitor (only one at a time)
8. Boot into windows and see if the monitors are correctly numbered in Windows and in Vegas.
9. If you have a third, repeat from 6.
10. GOOD LUCK!