Hello Hive Mind, I am a big noob here so I apologize if I am over/undersharing. I have been building a home server for the past few years and recently wanted to get a gaming VM going on Unraid, specifically Windows 10. From the research Ive done this should be 100% possible I just keep running into some hiccup. I will leave the steps I have taken below but I am unable to get the VM to boot with my GPU selected as the Graphics Card in the VMs settings. It will instantly give me the "internal error: Unknown PCI header type '127' for device '0000:01:00.0'" error code without even trying to start up. The odd thing to me is I have previously used this VM and installed all the software I needed using internal graphics before I received the GPU. I know the VM will work without using GPU passthrough but as soon as I try to use it we get that error. My VM XML: <?xml version='1.0' encoding='UTF-8'?> <domain type='kvm'> <name>GVM</name> <uuid>d208131f-d85f-662b-4d53-563aab316d59</uuid> <description>for gooning, I mean gaming</description> <metadata> <vmtemplate xmlns="unraid" name="Windows 10" icon="windows.png" os="windows10" webui=""/> </metadata> <memory unit='KiB'>16777216</memory> <currentMemory unit='KiB'>16777216</currentMemory> <memoryBacking> <nosharepages/> </memoryBacking> <vcpu placement='static'>12</vcpu> <cputune> <vcpupin vcpu='0' cpuset='2'/> <vcpupin vcpu='1' cpuset='3'/> <vcpupin vcpu='2' cpuset='4'/> <vcpupin vcpu='3' cpuset='5'/> <vcpupin vcpu='4' cpuset='6'/> <vcpupin vcpu='5' cpuset='7'/> <vcpupin vcpu='6' cpuset='8'/> <vcpupin vcpu='7' cpuset='9'/> <vcpupin vcpu='8' cpuset='10'/> <vcpupin vcpu='9' cpuset='11'/> <vcpupin vcpu='10' cpuset='12'/> <vcpupin vcpu='11' cpuset='13'/> </cputune> <os> <type arch='x86_64' machine='pc-q35-7.1'>hvm</type> <loader readonly='yes' type='pflash'>/usr/share/qemu/ovmf-x64/OVMF_CODE-pure-efi.fd</loader> <nvram>/etc/libvirt/qemu/nvram/d208131f-d85f-662b-4d53-563aab316d59_VARS-pure-efi.fd</nvram> </os> <features> <acpi/> <apic/> </features> <cpu mode='host-passthrough' check='none' migratable='on'> <topology sockets='1' dies='1' clusters='1' cores='6' threads='2'/> <cache mode='passthrough'/> </cpu> <clock offset='localtime'> <timer name='hpet' present='no'/> <timer name='hypervclock' present='no'/> <timer name='pit' tickpolicy='delay'/> <timer name='rtc' tickpolicy='catchup'/> </clock> <on_poweroff>destroy</on_poweroff> <on_reboot>restart</on_reboot> <on_crash>restart</on_crash> <devices> <emulator>/usr/local/sbin/qemu</emulator> <disk type='file' device='cdrom'> <driver name='qemu' type='raw'/> <source file='/mnt/user/isos/virtio-win-0.1.229-1.iso'/> <target dev='hdb' bus='sata'/> <readonly/> <address type='drive' controller='0' bus='0' target='0' unit='1'/> </disk> <disk type='file' device='disk'> <driver name='qemu' type='raw' cache='writeback' discard='ignore'/> <source file='/mnt/user/domains/VM/vdisk1.img'/> <target dev='hdc' bus='sata' rotation_rate='1'/> <boot order='1'/> <address type='drive' controller='0' bus='0' target='0' unit='2'/> </disk> <disk type='file' device='disk'> <driver name='qemu' type='raw' cache='writeback' discard='unmap'/> <source file='/mnt/user/domains/VM/vdisk2.img'/> <target dev='hdd' bus='virtio'/> <serial>vdisk2</serial> <address type='pci' domain='0x0000' bus='0x04' slot='0x00' function='0x0'/> </disk> <controller type='pci' index='0' model='pcie-root'/> <controller type='pci' index='1' model='pcie-root-port'> <model name='pcie-root-port'/> <target chassis='1' port='0x8'/> <address type='pci' domain='0x0000' bus='0x00' slot='0x01' function='0x0' multifunction='on'/> </controller> <controller type='pci' index='2' model='pcie-root-port'> <model name='pcie-root-port'/> <target chassis='2' port='0x9'/> <address type='pci' domain='0x0000' bus='0x00' slot='0x01' function='0x1'/> </controller> <controller type='pci' index='3' model='pcie-root-port'> <model name='pcie-root-port'/> <target chassis='3' port='0xa'/> <address type='pci' domain='0x0000' bus='0x00' slot='0x01' function='0x2'/> </controller> <controller type='pci' index='4' model='pcie-root-port'> <model name='pcie-root-port'/> <target chassis='4' port='0x13'/> <address type='pci' domain='0x0000' bus='0x00' slot='0x02' function='0x3'/> </controller> <controller type='pci' index='5' model='pcie-root-port'> <model name='pcie-root-port'/> <target chassis='5' port='0x14'/> <address type='pci' domain='0x0000' bus='0x00' slot='0x02' function='0x4'/> </controller> <controller type='pci' index='6' model='pcie-root-port'> <model name='pcie-root-port'/> <target chassis='6' port='0xb'/> <address type='pci' domain='0x0000' bus='0x00' slot='0x01' function='0x3'/> </controller> <controller type='pci' index='7' model='pcie-to-pci-bridge'> <model name='pcie-pci-bridge'/> <address type='pci' domain='0x0000' bus='0x01' slot='0x00' function='0x0'/> </controller> <controller type='virtio-serial' index='0'> <address type='pci' domain='0x0000' bus='0x02' slot='0x00' function='0x0'/> </controller> <controller type='sata' index='0'> <address type='pci' domain='0x0000' bus='0x00' slot='0x1f' function='0x2'/> </controller> <controller type='usb' index='0' model='qemu-xhci' ports='15'> <address type='pci' domain='0x0000' bus='0x00' slot='0x07' function='0x0'/> </controller> <interface type='bridge'> <mac address='52:54:00:3b:24:ca'/> <source bridge='br0'/> <model type='virtio-net'/> <address type='pci' domain='0x0000' bus='0x03' slot='0x00' function='0x0'/> </interface> <serial type='pty'> <target type='isa-serial' port='0'> <model name='isa-serial'/> </target> </serial> <console type='pty'> <target type='serial' port='0'/> </console> <channel type='unix'> <target type='virtio' name='org.qemu.guest_agent.0'/> <address type='virtio-serial' controller='0' bus='0' port='1'/> </channel> <input type='mouse' bus='ps2'/> <input type='keyboard' bus='ps2'/> <audio id='1' type='none'/> <hostdev mode='subsystem' type='pci' managed='yes'> <driver name='vfio'/> <source> <address domain='0x0000' bus='0x01' slot='0x00' function='0x0'/> </source> <address type='pci' domain='0x0000' bus='0x05' slot='0x00' function='0x0'/> </hostdev> <hostdev mode='subsystem' type='pci' managed='yes'> <driver name='vfio'/> <source> <address domain='0x0000' bus='0x01' slot='0x00' function='0x1'/> </source> <address type='pci' domain='0x0000' bus='0x06' slot='0x00' function='0x0'/> </hostdev> <hostdev mode='subsystem' type='usb' managed='no'> <source startupPolicy='optional'> <vendor id='0x046d'/> <product id='0xc542'/> </source> <address type='usb' bus='0' port='1'/> </hostdev> <hostdev mode='subsystem' type='usb' managed='no'> <source startupPolicy='optional'> <vendor id='0x1b1c'/> <product id='0x1bc7'/> </source> <address type='usb' bus='0' port='2'/> </hostdev> <watchdog model='itco' action='reset'/> <memballoon model='none'/> </devices> </domain> These are the steps/info I have taken thus far: VT-d, Above 4g Decoding, enabled IGFX, set Initial Display Output to IGFX and I believe VT-x is enabled by default on my mobo? (GIGABYTE Z690 UD AX DDR4, i searched in BIOS but did not find anything closely related to VT-x) Confirmed both the GPU and Audio device are in their own IOMMU group and bound to vfio-pci with reboot I fiddled with the bus/slots but to no avail, still getting internal error: Unknown PCI header type '127' for device '0000:01:00.0'. It seems most people get this error when trying to create a linux VM with GPU passthrough and Windows 10 GPU Passthough should be pretty self explanatory. I am using a GeForce RTX 5060 GPU with Gigabyte Z690 UD AX DDR4 mobo and Intel Core i9-12900K CPU. I will update the thread as we get progress!!! TYIA SOLUTION!!!! The GPU was failing to properly initialize and would fall asleep and not wake up again. ( noob terms ) This is the forum I followed and it worked!