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SOLUTION for Disabling NVIDIA Quadro P4000 Audio Controllers in Harvester PCI Passthrough I wanted to share the solution I used for disabling the "Audio device: NVIDIA Corporation GP104 High Definition Audio Controller" for NVIDIA Quadro P4000s in Harvester. I was able to disable the Tesla P40 and Quadro P4000 video/gpu controllers easily, but the audio controllers were stubborn and prevented scheduling of a new VM with the GPU. Problem: When I tried to assign a Quadro P4000 GPU to a new VM, I received this error:

0/1 nodes are available: 1 Insufficient <http://nvidia.com/GP104_HIGH_DEFINITION_AUDIO_CONTROLLER|nvidia.com/GP104_HIGH_DEFINITION_AUDIO_CONTROLLER>. preemption: 0/1 nodes are available: 1 No preemption victims found for incoming pod.

Solution: The audio controllers for the P4000 GPUs were still enabled and couldn’t be disabled via the Harvester UI. Here are the steps and commands that worked for me, starting from scratch: 1. List Custom Resource Definitions (CRDs) for PCI/GPU devices To identify relevant CRDs for PCI and GPU devices in Harvester:

bash
   kubectl get crd | grep -i -e pci -e gpu -e nvidia

2. Locate Specific Audio Controllers List and filter the

pcidevices

to find the exact resource names for the audio controllers (replace

0000:5e:00.1

and

0000:d9:00.1

with your PCI addresses):

bash
   kubectl get pcidevices.devices.harvesterhci.io | grep -E "0000:5e:00.1|0000:d9:00.1"

3. Inspect Each Audio Controller Resource Describe each audio controller to confirm its details:

bash
   kubectl describe pcidevices.devices.harvesterhci.io harvester01-00005e001
   kubectl describe pcidevices.devices.harvesterhci.io harvester01-0000d9001

4. Unbind the Audio Controllers from the Driver To release the devices, unbind them directly from the host’s driver:

bash
   echo "0000:5e:00.1" | sudo tee /sys/bus/pci/devices/0000:5e:00.1/driver/unbind
   echo "0000:d9:00.1" | sudo tee /sys/bus/pci/devices/0000:d9:00.1/driver/unbind

5. Force-Delete the Audio Controller Resources After unbinding, forcefully delete the audio controller resources to ensure they don’t interfere:

bash
   kubectl delete pcidevices.devices.harvesterhci.io harvester01-00005e001 --force --grace-period=0
   kubectl delete pcidevices.devices.harvesterhci.io harvester01-0000d9001 --force --grace-period=0