Virt-manager windows VM slowed down

[Kai Tchong]

My virt-manager build VM Windows 10 guest had some problems when I started using it in November 2023. I solved it along the lines of trying to get the intel GPU working as a vGPU for this virtual machine. I noticed some upgrades to the use of Nvidia were on the way. (It runs on a laptop with Nvidia dedicated GPU).

Two kernel updates arrived in a row the past two weeks. I saw many gpu features were involved though i'm not deep enough into Linux kernels to know exactly what is going on.

The first one was the update to linux-image-5.15.0-92-lowlatency (and it's accompanying modules and headers). The second one was linux-headers-5.15.0-94-lowlatency. That one causes my VM to be slow as it was at the start.

I use the intel gpu through a virtio driver since I cannot passthrough the Nvidia card. I need that for several other applications. But with the nvme Windows is installed on it works quite flawlessly for a while now. Until this kernel update. I had to roll it back.

Thought it would be best to leave a note here.