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+id = 1598
+title = "vfio-pci - Intel Arc DG2 - host errors"
+state = "closed"
+created_at = "2023-04-13T06:28:47.508Z"
+closed_at = "2025-01-15T13:01:51.964Z"
+labels = ["VFIO"]
+url = "https://gitlab.com/qemu-project/qemu/-/issues/1598"
+host-os = "Arch Linux"
+host-arch = "x86_64"
+qemu-version = "7.2.1"
+guest-os = "Windows 10"
+guest-arch = "x86_64"
+description = """The host continues to respond (slowly) after the VM is shutdown. Speeds back up to normal after about an hour. However, a reboot is required to get the host to operate normally.
+
+When shutting down the VM, the host starts to display the following messages in dmesg:
+
+[Thu Apr 13 01:30:47 2023] vfio-pci 0000:18:00.0: not ready 1023ms after FLR; waiting
+[Thu Apr 13 01:30:49 2023] vfio-pci 0000:18:00.0: not ready 2047ms after FLR; waiting
+[Thu Apr 13 01:30:52 2023] vfio-pci 0000:18:00.0: not ready 4095ms after FLR; waiting
+[Thu Apr 13 01:30:57 2023] vfio-pci 0000:18:00.0: not ready 8191ms after FLR; waiting
+[Thu Apr 13 01:31:06 2023] vfio-pci 0000:18:00.0: not ready 16383ms after FLR; waiting
+[Thu Apr 13 01:31:25 2023] vfio-pci 0000:18:00.0: not ready 32767ms after FLR; waiting
+[Thu Apr 13 01:31:59 2023] vfio-pci 0000:18:00.0: not ready 65535ms after FLR; giving up
+[Thu Apr 13 01:32:11 2023] vfio-pci 0000:18:00.0: not ready 1023ms after bus reset; waiting
+[Thu Apr 13 01:32:13 2023] vfio-pci 0000:18:00.0: not ready 2047ms after bus reset; waiting
+[Thu Apr 13 01:32:16 2023] vfio-pci 0000:18:00.0: not ready 4095ms after bus reset; waiting
+[Thu Apr 13 01:32:21 2023] vfio-pci 0000:18:00.0: not ready 8191ms after bus reset; waiting
+[Thu Apr 13 01:32:31 2023] vfio-pci 0000:18:00.0: not ready 16383ms after bus reset; waiting
+[Thu Apr 13 01:32:48 2023] vfio-pci 0000:18:00.0: not ready 32767ms after bus reset; waiting
+[Thu Apr 13 01:33:22 2023] vfio-pci 0000:18:00.0: not ready 65535ms after bus reset; giving up"""
+reproduce = """1. Shutdown VM."""
+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 shutdown the VM that issue presents itself.
+
+revert.sh
+
+```
+#!/bin/bash
+set -x
+
+systemctl reboot # to workaround host lockup on shutdown
+
+# Load the config file with our environmental variables
+source "/etc/libvirt/hooks/kvm.conf"
+source "/etc/libvirt/hooks/vmPreBootSetup"
+
+cpuSchedutil
+
+# Unload VFIO-PCI Kernel Driver
+modprobe -r vfio_pci
+modprobe -r vfio_iommu_type1
+modprobe -r vfio
+
+# Re-Bind GPU to our display drivers
+virsh nodedev-reattach $VIRSH_GPU_VIDEO
+virsh nodedev-reattach $VIRSH_GPU_AUDIO
+
+#modprobe drm_buddy intel_gtt video drm_display_helper cec ttm i915
+
+# Restart Display Manager
+systemctl restart sddm.service
+```
+
+
+
+Full dmesg log: 
+[vfio_13_april_2023.txt](/uploads/5d5b642595c53cabb3c3608c07d59eb3/vfio_13_april_2023.txt)"""