[SOLVED] GPU passthrough Optiplex 7050 with intel iGPU

[rupert160]

I've been trying to get a Optiplex 7050 with an integrated Intel Corporation HD Graphics 630 GPU setup to do pass through.
Success is to get `lspci -nnk -d 8086:5912` | grep 'Kernel driver in use' == vfio-pci much like : forum[dot]level1techs[dot]com/t/passthrough-does-not-work/148313/16

I have used the suggestion in this post to rebuild: forum[dot]proxmox[dot]com/threads/problem-with-pass-through-cannot-change-initramfs.126627/#post-631013

and following along with: server-world[dot]info/en/note?os=Debian_12&p=kvm&f=13

I've got a fair way with the following script, have updated initramfs and by a miracle the system hasn't hung but vfio-pci is still not shown it keeps picking up i915 driver and if I remove `softdep ${module} pre: vfio-pci` no driver is picked up at all, and crashes. I have before creating a new initramfs been able to run without Graphics driver loaded.

The resultant environment is this:

# lsmod | grep vfio
vfio_pci               16384  0
vfio_pci_core          86016  1 vfio_pci
irqbypass              12288  2 vfio_pci_core,kvm
vfio_iommu_type1       49152  0
vfio                   57344  3 vfio_pci_core,vfio_iommu_type1,vfio_pci
iommufd                77824  1 vfio

# dmesg | grep VFIO
[    2.583809] VFIO - User Level meta-driver version: 0.3

# lspci -nnk -d 8086:5912
00:02.0 VGA compatible controller [0300]: Intel Corporation HD Graphics 630 [8086:5912] (rev 04)
    Subsystem: Dell HD Graphics 630 [1028:07a1]
    Kernel driver in use: i915
    Kernel modules: i915

# lspci -nnk -d 8086:a2f0
00:1f.3 Audio device [0403]: Intel Corporation 200 Series PCH HD Audio [8086:a2f0]
    Subsystem: Dell 200 Series PCH HD Audio [1028:07a1]
    Kernel driver in use: snd_hda_intel
    Kernel modules: snd_hda_intel, snd_soc_avs

I've changed the hyphen to underscore and back again on `vfio-pci` and vfio_pci` - I'm currently at the following config:

# cat /etc/initramfs-tools/modules
vfio
vfio_iommu_type1
vfio_pci

# cat /etc/modules-load.d/modules.conf
vfio
vfio_iommu_type1
vfio_pci

# cat /etc/modprobe.d/i915.conf
install i915 /bin/false
blacklist i915
softdep i915 pre: vfio-pci
options vfio-pci ids=8086:5912,8086:a2f0 disable_vga=1


linux    /boot/vmlinuz-6.5.11-8-pve root=UUID=XXX-XXX-X-XX-XXX ro quiet intel_iommu=on iommu=pt

linux    /boot/vmlinuz-6.5.11-8-pve root=UUID=XXX-XXX-X-XX-XXX ro quiet intel_iommu=on iommu=pt

linux    /boot/vmlinuz-6.5.11-8-pve root=UUID=XXX-XXX-X-XX-XXX ro single
# grep 'GRUB_CMDLINE_LINUX_DEFAULT' /boot/default/grub
GRUB_CMDLINE_LINUX_DEFAULT="quiet intel_iommu=on iommu=pt"

I'd appreciate any ideas.

 

[rupert160]

I discovered that what I thought was a frozen host screen was actually a desired outcome initially!
removing:

softdep i915 pre: vfio-pci

and allowing a hung screen momentarily, pre-requisite.
When the iGPU is selected by the virtual machine it then changes to:

# lspci -nnk -d 8086:5912
00:02.0 VGA compatible controller [0300]: Intel Corporation HD Graphics 630 [8086:5912] (rev 04)
    Subsystem: Dell HD Graphics 630 [1028:07a1]
    Kernel driver in use: vfio-pci
    Kernel modules: i915

Which is exactly what I needed. Basically I prematurely thought my configuration was incorrect, it was actually correct and awaiting attachment to the VM.