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authorChristian Krinitsin <mail@krinitsin.com>2025-07-03 07:27:52 +0000
committerChristian Krinitsin <mail@krinitsin.com>2025-07-03 07:27:52 +0000
commitd0c85e36e4de67af628d54e9ab577cc3fad7796a (patch)
treef8f784b0f04343b90516a338d6df81df3a85dfa2 /results/classifier/gemma3:12b/device/1597
parent7f4364274750eb8cb39a3e7493132fca1c01232e (diff)
downloadqemu-analysis-d0c85e36e4de67af628d54e9ab577cc3fad7796a.tar.gz
qemu-analysis-d0c85e36e4de67af628d54e9ab577cc3fad7796a.zip
add deepseek and gemma results
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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
+
+```