[question] GUI extreme slow after install Nvidia Driver

[xcity]

Describe the problem I am new to meshroom, but I am experienced IT guy, so trying to get some hints of what's going on. My setup is a bit tricky, that I am using a vGPU in cloud center, vGPU is a Nvidia tech to virtually split physical GPU into several virtualized ones. I had a GPU (vGPU) inside Windows VM, which was fine for all other applications, I didn't spot any issue.

However, in meshroom, when I had no Nvidia driver installed, then meshroom GUI is very responsible, but, when I installed CUDA and Nvidia driver, which is essential for meshroom and others, meshroom GUI becomes very slow, almost take few seconds to responsible to a mouse click.

I tried different Nvidia drivers and CUDA versions (CUDA 10, 11, etc), and result is the same.

From resource monitor, I did see meshroom actively using GPU, just now sure why it's getting slow. I am running out of ideas, looking forwards to see some advice.

[natowi]

The 3d environment in qt consumes some gpu ressources when running the Meshroom GUI, so I think the issue is probably related to qt and nvidia. I assume running Meshroom from the cli works fine?