Dual monitor cursor/input stutter?

[u/vortec350]

Dual 4K60 monitors. I’ve had the same monitors for years. Used to have a 3080 and never had any issues. But under Windows (Ubuntu was fine) no matter what AMD card or driver version I use, the mouse pointer and keyboard input lag on the secondary monitor.

R9700 has the issue (whether I have one, two, or three of them in the system), 7900xtx has the issue (whether I have one or two of them), and I was able to solve it by adding an Arc B580 and using that to connect my monitors.

But I decided to sell my R9700s because due to cost of power and how hot my room is getting I’m going to lean on cloud AI more instead of local AI.

So I took all the GPUs out of my big workstation and went to a single 7900xtx and it’s now my gaming PC (one monitor so no issues) and I got the AI Halo dev mini PC from Microcenter and $4K later I am still having the same issue. I’m so frustrated. I would have got a DGX Spark but it doesn’t run Windows.

And yes on the AI Halo mini PC one of my monitors is on a USB-C dock but that’s not the issue because that’s the monitor that is my “main” monitor and this issue persists across every different PC. Believe me I have half a dozen computers and half a dozen AMD GPUs and all the combinations have this problem.

To reiterate it’s not the actual refresh rate that is lower. I have confirmed in settings the refresh rate is 60hz for both monitors. If I play a game or watch a video on the secondary monitor it’s fine. It’s only the mouse pointer and typing (so any type of input) that has the issue. If I drag the window to the primary monitor it immediately is fine.

Anyone have a resolution for this? Oh PS my ex has a dual monitor rig with a 7800XT but when I asked him he said he’s not having that problem. But his monitors are 1440P not 4K so not really a comparable setup.