I recently reinstalled Unraid and am having issues with getting the VM's to run. I can get a VM to start, but minutes later it freezes and I am no longer able to connect to unraid (webgui/ping/etc). Passthrough is working fine (gpu,usb) and I have tried using an old working xml and creating new xmls for both windows and ubuntu. I have tried moving the image location between cache and 2 ssd's mounted with SNAP.

 

Go script:

#!/bin/bash
# Start the Management Utility
/usr/local/sbin/emhttp &
#Snap drives
/boot/config/plugins/snap/snap.sh -ms 14290D26A126 ext
#/boot/config/plugins/snap/snap.sh -ms OCZ-Q458GG11QG381026 vm1
#Bind passthrough devices
/usr/local/sbin/vfio-bind 0000:02:00.0 0000:02:00.1 0000:01:00.0 0000:01:00.1 0000:03:00.0

 

 

Log window open while running the VM (in this case I restarted the VM and I was unable to connect). I am not sure what the MSI/MSI-x is:

Apr 12 22:40:46 Tower kernel: device vnet0 entered promiscuous mode
Apr 12 22:40:46 Tower kernel: br0: port 2(vnet0) entered listening state
Apr 12 22:40:46 Tower kernel: br0: port 2(vnet0) entered listening state
Apr 12 22:40:46 Tower kernel: vfio-pci 0000:02:00.0: enabling device (0400 -> 0403)
Apr 12 22:40:46 Tower kernel: vfio-pci 0000:02:00.1: enabling device (0400 -> 0402)
Apr 12 22:40:50 Tower kernel: usb 6-3: reset low-speed USB device number 2 using ohci-pci
Apr 12 22:40:50 Tower kernel: usb 6-3: reset low-speed USB device number 2 using ohci-pci
Apr 12 22:40:51 Tower kernel: usb 6-3: reset low-speed USB device number 2 using ohci-pci
Apr 12 22:40:52 Tower kernel: usb 6-3: reset low-speed USB device number 2 using ohci-pci
Apr 12 22:40:52 Tower kernel: kvm: zapping shadow pages for mmio generation wraparound
Apr 12 22:41:01 Tower kernel: br0: port 2(vnet0) entered learning state
Apr 12 22:41:16 Tower kernel: br0: topology change detected, propagating
Apr 12 22:41:16 Tower kernel: br0: port 2(vnet0) entered forwarding state
Apr 12 22:41:26 Tower kernel: kvm [15873]: vcpu0 unimplemented perfctr wrmsr: 0xc0010004 data 0xffff
Apr 12 22:41:28 Tower kernel: usb 6-3: reset low-speed USB device number 2 using ohci-pci
Apr 12 22:41:29 Tower kernel: usb 6-3: reset low-speed USB device number 2 using ohci-pci
Apr 12 22:41:29 Tower kernel: vfio-pci 0000:02:00.0: irq 31 for MSI/MSI-X
Apr 12 22:41:30 Tower kernel: usb 6-3: reset low-speed USB device number 2 using ohci-pci
Apr 12 22:41:31 Tower kernel: usb 6-3: reset low-speed USB device number 2 using ohci-pci
Apr 12 22:41:31 Tower kernel: usb 6-3: reset low-speed USB device number 2 using ohci-pci
Apr 12 22:41:39 Tower kernel: kvm [15873]: vcpu1 ignored rdmsr: 0x3a
Apr 12 22:41:39 Tower kernel: vfio-pci 0000:02:00.1: irq 32 for MSI/MSI-X
Apr 12 22:42:58 Tower kernel: usb 6-3: reset low-speed USB device number 2 using ohci-pci
Apr 12 22:42:59 Tower kernel: usb 6-3: reset low-speed USB device number 2 using ohci-pci
Apr 12 22:43:01 Tower kernel: usb 6-3: reset low-speed USB device number 2 using ohci-pci
Apr 12 22:43:02 Tower kernel: usb 6-3: reset low-speed USB device number 2 using ohci-pci

 

xml:

<domain type='kvm' xmlns:qemu='http://libvirt.org/schemas/domain/qemu/1.0'>
  <name>kodi</name>
  <uuid>f629caf0-002e-cc3e-7523-ce484e3c58b1</uuid>
  <memory unit='KiB'>3145728</memory>
  <currentMemory unit='KiB'>3145728</currentMemory>
  <vcpu placement='static'>2</vcpu>
  <os>
    <type arch='x86_64' machine='pc-q35-2.1'>hvm</type>
    <boot dev='cdrom'/>
    <boot dev='hd'/>
  </os>
  <features>
    <acpi/>
    <apic/>
  </features>
  <clock offset='localtime'>
    <timer name='rtc' tickpolicy='catchup'/>
    <timer name='pit' tickpolicy='delay'/>
    <timer name='hpet' present='yes'/>
  </clock>
  <on_poweroff>destroy</on_poweroff>
  <on_reboot>restart</on_reboot>
  <on_crash>restart</on_crash>
  <devices>
    <emulator>/usr/bin/qemu-system-x86_64</emulator>
    <disk type='file' device='disk'>
      <driver name='qemu' type='qcow2'/>
      <source file='/mnt/cache/appdata/kodi/kodi.qcow2'/>
      <target dev='hda' bus='virtio'/>
      <address type='pci' domain='0x0000' bus='0x02' slot='0x03' function='0x0'/>
    </disk>
    <disk type='file' device='cdrom'>
      <driver name='qemu' type='raw'/>
      <source file='/mnt/cache/.virtual_machines/cdroms/kodibuntu-14.0~helix_amd64.iso'/>
      <target dev='hdc' bus='sata'/>
      <readonly/>
      <address type='drive' controller='0' bus='0' target='0' unit='2'/>
    </disk>
    <controller type='usb' index='0' model='ich9-ehci1'>
      <address type='pci' domain='0x0000' bus='0x02' slot='0x02' function='0x7'/>
    </controller>
    <controller type='usb' index='0' model='ich9-uhci1'>
      <master startport='0'/>
      <address type='pci' domain='0x0000' bus='0x02' slot='0x02' function='0x0' multifunction='on'/>
    </controller>
    <controller type='sata' index='0'>
      <address type='pci' domain='0x0000' bus='0x00' slot='0x1f' function='0x2'/>
    </controller>
    <controller type='pci' index='0' model='pcie-root'/>
    <controller type='pci' index='1' model='dmi-to-pci-bridge'>
      <address type='pci' domain='0x0000' bus='0x00' slot='0x1e' function='0x0'/>
    </controller>
    <controller type='pci' index='2' model='pci-bridge'>
      <address type='pci' domain='0x0000' bus='0x01' slot='0x01' function='0x0'/>
    </controller>
    <interface type='bridge'>
      <mac address='52:54:00:55:6d:40'/>
      <source bridge='br0'/>
      <model type='virtio'/>
      <address type='pci' domain='0x0000' bus='0x02' slot='0x01' function='0x0'/>
    </interface>
    <hostdev mode='subsystem' type='usb' managed='no'>
      <source>
        <address bus='6' device='2'/>
      </source>
    </hostdev>
    <memballoon model='virtio'>
      <address type='pci' domain='0x0000' bus='0x02' slot='0x04' function='0x0'/>
    </memballoon>
  </devices>
  <qemu:commandline>
    <qemu:arg value='-device'/>
    <qemu:arg value='ioh3420,bus=pcie.0,addr=1c.0,multifunction=on,port=1,chassis=1,id=root.1'/>
    <qemu:arg value='-device'/>
    <qemu:arg value='vfio-pci,host=02:00.0,bus=root.1,addr=00.0,multifunction=on,x-vga=on'/>
    <qemu:arg value='-device'/>
    <qemu:arg value='vfio-pci,host=02:00.1,bus=root.1,addr=00.1'/>
  </qemu:commandline>
</domain>

I know this is an old topic but I am having the exact same problem in the latest unraid 6.2 beta 21. Unraid web gui working fine and then as soon as I launch a vm with gpu passthrough the host freezes. I have tried with one and two gpus in the machine as I understand that once you steal a gpu from the host you need to restart to get it back.

 

From within the vm, I am unable to navigate to http://tower or ping it. Has anybody else seen this issue in unraid 6.2?

I am having this exact issue right now with my Nvidia 960.