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authorChristian Krinitsin <mail@krinitsin.com>2025-06-01 21:35:14 +0200
committerChristian Krinitsin <mail@krinitsin.com>2025-06-01 21:35:14 +0200
commit3e4c5a6261770bced301b5e74233e7866166ea5b (patch)
tree9379fddaba693ef8a045da06efee8529baa5f6f4 /gitlab/issues_text/target_missing/host_missing/accel_missing/1597
parente5634e2806195bee44407853c4bf8776f7abfa4f (diff)
downloadqemu-analysis-3e4c5a6261770bced301b5e74233e7866166ea5b.tar.gz
qemu-analysis-3e4c5a6261770bced301b5e74233e7866166ea5b.zip
clean up repository
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-Intel Arc A-Series GPUs VFIO passthrough no video out
-Description of problem:
-Once the VM is booted, the screen goes blank.
-Steps to reproduce:
-1. Passthough any Intel Arc A (Alchemist) series video card.
-2. Boot VM.
-3. Screen goes blank.
-Additional information:
-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
-
-```