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+id = 1597
+title = "Intel Arc A-Series GPUs VFIO passthrough no video out"
+state = "closed"
+created_at = "2023-04-13T04:22:19.631Z"
+closed_at = "2023-05-09T01:43:48.009Z"
+labels = ["VFIO"]
+url = "https://gitlab.com/qemu-project/qemu/-/issues/1597"
+host-os = "Arch Linux"
+host-arch = "x86_64"
+qemu-version = "7.2.1"
+guest-os = "Windows 10"
+guest-arch = "x86_64"
+description = """Once the VM is booted, the screen goes blank."""
+reproduce = """1. Passthough any Intel Arc A (Alchemist) series video card.
+2. Boot VM.
+3. Screen goes blank."""
+additional = """I have startup and shutdown scripts that detach and reattach the card and these scripts work fine if I test them alone. It's only when I start the VM that issue presents itself.
+
+
+
+kernel command line:
+
+```
+amd_iommu=on iommu=pt rd.driver.pre=vfio-pci pci=realloc iommu=1 i915.force_probe=*
+
+```
+
+startup script:
+
+```
+#!/bin/bash
+# Helpful to read output when debugging
+set -x
+
+# Load the config file with our environmental variables
+source "/etc/libvirt/hooks/kvm.conf"
+source "/etc/libvirt/hooks/vmPreBootSetup"
+
+cpuPerf
+
+# Stop your display manager. If you're on kde it'll be sddm.service. Gnome users should use 'killall gdm-x-session' instead
+systemctl stop gdm.service
+
+# Unbind VTconsoles
+echo 0 > /sys/class/vtconsole/vtcon0/bind
+echo 0 > /sys/class/vtconsole/vtcon1/bind
+
+# Avoid a race condition by waiting a couple of seconds. This can be calibrated to be shorter or longer if required for your system
+sleep 2
+
+modprobe -r drm_buddy intel_gtt video drm_display_helper cec ttm i915
+
+# Unbind the GPU from display driver
+virsh nodedev-detach $VIRSH_GPU_VIDEO
+virsh nodedev-detach $VIRSH_GPU_AUDIO
+
+# Load VFIO kernel module
+modprobe vfio
+modprobe vfio_pci
+modprobe vfio_iommu_type1
+
+sleep 5s ; systemctl restart connman.service
+
+```"""