Duplicate video streams in one window.

[cattywampus4]

Hi,

 

Having a bizarre issue here that has just started recently.

 

When I launch FO4, what appears to be two identical video streams are loading with in the 'wrapper'. They are stacked on top of each other with a gap in the middle. I have attached a photo taken of my screen to show this.

 

I am running a Dell 4K display along side a standard widescreen monitor. I play and always have played on the 4K screen at 1920x1080.

 

A few things that I have tried:

 

• Unplugging the 4K power and plugging it back in again allows the game to work ok. If I ALT+TAB a few times, it breaks and splits into 2 stacked video outputs. Simple switching the screen off and on again doesn't make a difference.
• I have re-installed the Nvidia drivers for my GTX 970. No change.
• If I load the game up on the non-4K screen, it works fine.
• Putting the resolution of the 4K screen down to 1920x1080 and starting the game makes no difference.

I am in the process of running verficiation of game caches using Steam. I have tried deleting all the relevant .ini config files to see if that made a difference but it didnt.

 

Does anyone have any ideas?

 

Thanks.