GLWindow fullscreen SPAN failure

Hello,

On our PC (AMD Ryzen Threadripper Pro 3945WX with NVIDIA Quadro RTX5000) we have a problem running fullscreen GLWindow spanned on multiple monitors.

First I had this problem with an Processing Application, but I tracked the error down and made a small native Java Application with JOGL and GLWindow and there is the same Error.

When I start the application in fullscreen with SPAN over two 4k projectors the application starts only on first monitor and is not spanned at all. Also it looks like the Windows10 UI dpi Scaling is changed to a much higher value (something like 400%). The problem only occurs when using fullscreen with SPAN. Normal fullscreen works.

I tried it with different Workstations and the problem only occurred with this configuration. I also tried it on Linux and there it works without problems.

if you have some information about this it would be very nice.

thanks and all the best,
Holunder

Hello

Where is your "small native Java Application with JOGL and GLWindow"? Have you tried to disable HiDPI? (it would only be a workaround)