Dual monitor problem

[ijan]

Dear...

I have a strange problem with dual monitor setup. I build an application using NI 9426 digital input as a trigger to play a video using WMP activeX. My video card has a DVI and VGA output, each output connected to Aten video splitter since i need to duplicate the display into several monitor. The strange problem is labview identifiy the display number incorrectly. Labview detect display 1 as 2 and vice versa i realize this because when i set a vi to be displayed in monitor 1 it is appear in monitor 2. Then i reverse the appearance setting in reverse, a vi that i want to be displayed in monitor 1 i set in monitor 2 and a vi that i want to be displayed in monitor 2 i set in monitor 1. This setting work fine untill another strange problem appear, randomly the 2 running vi swap position by itself while running. i can't figure out what is the problem, is it for the program inside VI? due to video splitter? or my video card?

any help would be very appreciated

thank you

[rpursley8]

If you go into the VI properties one of the Categories is  Window Run-Time Position.  If you have the Position set to Unchanged or Custom, the Monitor drop-down is disabled.

But you can access this with a property node.

On the block diagram, in the Application Control menu, drop down a VI Server Reference and then and Property node.  Connect the reference to the Property node.  Select the Front Panel Window>>Monitor property.  Entering a 1 will display the front panel on the primary, a 2 wil be the secondary.  This should ensure which monitor a specific VI is displayed on..

[Bauer_CT]

I realize this is quite an old thread but I have a similar issue. I have four monitors and I want to force my LabVIEW2016 EXE to run on Monitor 3 in Windows 7.

I have one display duplicated to monitor 1 and 4, then 2 and 3 are extended. So four screens showing three different views.

(Monitor 1 and 4 are the same because two operator stations both want to see the same main view)

When I use FP.Monitor, it doesn't really work. Setting 2 works but any other setting just puts the EXE on Monitor 1&4

When I make it so all monitors have separate displays (e.g. all Extended, no Duplicated) then the FP.Monitor works fine.

I guess it's a bug with FP.Monitor when using Duplicate display option?

[Frozen]

That is a strange monitor setup. I didn't even realize you could do something like that.

Check out <https://forums.ni.com/t5/LabVIEW/Multiple-Screen-Monitor-Application-Best-Method/m-p/3815093#M107765...>

I would recommend you move the vi to each of your 4 (3?) monitors and run the vi.
The other thing to do is press the "Identify Monitor" button from Windows so you know which monitors are which.

[Bauer_CT]

Thanks Frozen

That link is helpful. I will see what monitor it thinks its on when I have the duplicating displays. Using the "Identify" feature inside setting resolution is how I knew which was which, and how I could make it work when Extending rather than Duplicating.