NVIDIA Issue with thunderbolt injection

[Athompson]

Built wife a new pc/ desk setup over the weekend. She also needs to dock a work computer during the day so I did the following set-up

 

visiontek 2900 kvm going to two 27” 2k displays.

 

the kvm plugs into both the laptop and the desktop with a usb-c cable running over the dp-alt standard. Laptop works great. On desktop pc I installed an ASUS thunderbolt ex card to do the dp injection into the line. This works great in the bios screen and in the boot animation for windows 11. It does not work well at all in windows. Basically it doesn’t see either display sometimes, then windows eventually finds them but they’re at 640 x 480. If I go and manually change the edid, they blank out and do not work. I’ve tried a fresh install of windows with and without the nvidia drivers and if anything the nvidia drivers make it worse. 
 

after messing with this for some time I uninstalled the nvidia drivers and installed a 6700 xt from my computer into hers and the thing works great. I don’t want to leave it this way, but I can’t for the life of me figure out why the 4060ti is not playing nice. Any ideas?

[Likwid]

1 hour ago, Athompson said:

Built wife a new pc/ desk setup over the weekend. She also needs to dock a work computer during the day so I did the following set-up

 

visiontek 2900 kvm going to two 27” 2k displays.

 

the kvm plugs into both the laptop and the desktop with a usb-c cable running over the dp-alt standard. Laptop works great. On desktop pc I installed an ASUS thunderbolt ex card to do the dp injection into the line. This works great in the bios screen and in the boot animation for windows 11. It does not work well at all in windows. Basically it doesn’t see either display sometimes, then windows eventually finds them but they’re at 640 x 480. If I go and manually change the edid, they blank out and do not work. I’ve tried a fresh install of windows with and without the nvidia drivers and if anything the nvidia drivers make it worse. 
 

after messing with this for some time I uninstalled the nvidia drivers and installed a 6700 xt from my computer into hers and the thing works great. I don’t want to leave it this way, but I can’t for the life of me figure out why the 4060ti is not playing nice. Any ideas?

Are you using single or multiple mini-displayport ports?

[Athompson]

14 hours ago, Likwid said:

Are you using single or multiple mini-displayport ports?

I've tried using one and 2 - does not appear to make a difference on Nvidia. the AMD card is working correctly with just 1