I first noticed that my new desktop that outputs in 4K(3840x2160) cannot even play my Pano2VR Pro tour created more than a year ago with a z1.

Then with a possible truck interior tour job I wanted to test how Pano2VR Pro handles this screen resolution and say 100-180MP panoramas.

So I did a short virtual tour in Pano2VR Pro with my van interior and tested it on my PC locally. It did not go well at all with even 105MP panos not rotating normally and they were more like dragged.

Then on Pano2VR Facebook group when I asked what's wrong I got a lot of links to tours created with 200MP or even 1.3GB panos. All who posted said they tours were working for them.
However they all weren't working for me showing the same symptoms as my localhost van tour.

There were no problems at all though with any lower screen resolution but 4K(3840x2160). It simply was not working as long as I set my display resolution to 4K.

So I started digging and found online people complaining a year ago that Hardware Acceleration did not work with NVIDIA Quadro k2000 properly.

I went to Chrome settings and turn it off. And all tours that did not work before started working. It wa a bit slower to pan and tilt them but it was not near that bad than before.

Then I found out that NVIDIA released in August 2020 a new driver(I believe it is 460 release) where the problems was completelly fixed.

After I installed the new driver I can use hardware acceleration and it is faster that with it set to OFF. And it is actually must faster when you turn it ON.

So if you have a pc with NVIDIA Quadro k2000 GPU or probably any other 4K card and you find that big panos are not rotating freely and there is a huge lag either turn Hardware Acceleration OFF or check for a new driver for your GPU model.