AMD iGPU (Raphael, Ryzen9 7900x) - System Reboots on Passthrough

[nothingto]

Proxmox 8:

I have two GPUs:

iGPU: Ryzen 9 7900x (Raphael)
dGPU: NVIDIA 4090
Motherboard: Asus Rog Strix 650E-F

What happens is that when I pass through my iGPU, the host just reboots automatically when I TURN ON my guest VM everytime. When I instead passed through my RTX 4090 GPU, it worked fine.

What I wanted to do was passthrough both of those gpus to separate VMs.

Here is my boot grub:

GRUB_CMDLINE_LINUX_DEFAULT="quiet amd_iommu=on iommu=pt nomodeset pcie_acs_override=downstream initcall_blacklist=sysfb_init"

Here is my /etc/modules

vfio
vfio_iommu_type1
vfio_pci

Here is my blacklists for GPU

blacklist amdgpu
blacklist radeon
blacklist nouveau
blacklist nvidia*

I added the PCI device for my iGPU, i have the settings where it ticks PCI-Express, ROM Bar, All Functions.

Whenever I start the VM, it automatically reboots the host/whole system. Any idea why this could be? I do have my motherboard set to POSTing with iGPU.

 

[PXMX1001]

I am running into errors as well for 7950x igpu passthrough

 

[leesteken]

What happens is that when I pass through my iGPU, the host just reboots automatically when I TURN ON my guest VM everytime.

Check your IOMMU groups): https://pve.proxmox.com/wiki/PCI_Passthrough#Verify_IOMMU_isolation
The integrated graphics is probably part of a larger group and .... (this had been talked about many times before on this forum, for example: https://forum.proxmox.com/threads/proxmox-usb-controller-passthrough-to-vm.157872/post-723181 ).

 

[PXMX1001]

https://forum.proxmox.com/threads/igpu-passthrough-with-amd-7950x.157950/

This is my post and how I just fixed the problem