Hello, I'm currently working to setup a windows virtual machine with gpu passthrough on my archlinux host. So at first i created a basic VM with a custom qemu command and it work great. qemu-system-x86_64 -enable-kvm -m 8192 -cpu host,kvm=off,hv_relaxed,hv_spinlocks=0x1fff,hv_vapic,hv_time,hv_vendor_id=whatever\ -smp cores=4,threads=2\ -device vfio-pci,host=02:00.0,x-vga=on\ -device vfio-pci,host=02:00.1\ -vga none\ -soundhw hda\ -drive file=/dev/sdb,id=diska,format=raw\ -drive file=/dev/sdd,id=diskb,format=raw\ -cdrom /dev/sr0\ -usb -usbdevice host:1b1c:1b13\ -usbdevice host:1b1c:1b12\ -usbdevice host:1b1c:1c08\ -usbdevice host:046d:0a1f\ -usbdevice host:28de:1142 Today i would to go use virt-manager to manage my virtual machine but if i create a basic virtual machine with only the gpu added the gpu is never used. I can see the GPU in the peripheral manager but it's in error 43. The -cpu argument have the same settings as my old setup ( -cpu host,kvm=off,hv_relaxed,hv_spinlocks=0x1fff,hv_vapic,hv_time,hv_vendor_id=whatever) Before on my old setup if i didn't add those options, the gpu was working i had an image on my screen. Here, the screen remain in sleep mode, i have to use a spice screen to see what's going on the vm. FYI, guest graphic card is a gtx670 02:00.0 & 02:00.1 [ 10de:1189 & 10de:0e0a ] So here's the qemu command line started by virtmanager /usr/sbin/qemu-system-x86_64 -name guest=Windows_10,debug-threads=on -S\ -object secret,id=masterKey0,format=raw,file=/var/lib/libvirt/qemu/domain-24-Windows_10/master-key.aes\ -machine pc-i440fx-2.8,accel=kvm,usb=off,vmport=off,dump-guest-core=off\ -cpu host,hv_time,hv_relaxed,hv_vapic,hv_spinlocks=0x1fff,hv_vendor_id=whatever,kvm=off\ -drive file=/usr/share/ovmf/x64/ovmf_x64.bin,if=pflash,format=raw,unit=0,readonly=on\ -drive file=/var/lib/libvirt/qemu/nvram/Windows_10_VARS.fd,if=pflash,format=raw,unit=1\ -m 16386 -realtime mlock=off -smp 8,sockets=8,cores=1,threads=1 -uuid fc05f50e-8a97-4c51-a8c5-627824d8075c\ -display none -no-user-config -nodefaults -chardev socket,id=charmonitor,path=/var/lib/libvirt/qemu/domain-24-Windows_10/monitor.sock,server,nowait\ -mon chardev=charmonitor,id=monitor,mode=control -rtc base=localtime -no-shutdown -global PIIX4_PM.disable_s3=1\ -global PIIX4_PM.disable_s4=1 -boot strict=on\ -device nec-usb-xhci,id=usb,bus=pci.0,addr=0x5\ -drive file=/home/makz/virtio-win-0.1.134.iso,format=raw,if=none,id=drive-ide0-0-0,readonly=on\ -device ide-cd,bus=ide.0,unit=0,drive=drive-ide0-0-0,id=ide0-0-0\ -drive file=/dev/sdb,format=raw,if=none,id=drive-virtio-disk0,cache=writeback\ -device virtio-blk-pci,scsi=off,bus=pci.0,addr=0x8,drive=drive-virtio-disk0,id=virtio-disk0,bootindex=1\ -drive file=/dev/sdd,format=raw,if=none,id=drive-virtio-disk1,cache=writeback\ -device virtio-blk-pci,scsi=off,bus=pci.0,addr=0x9,drive=drive-virtio-disk1,id=virtio-disk1\ -netdev tap,fd=25,id=hostnet0,vhost=on,vhostfd=27\ -device virtio-net-pci,netdev=hostnet0,id=net0,mac=52:54:00:88:db:2f,bus=pci.0,addr=0x3\ -device intel-hda,id=sound0,bus=pci.0,addr=0x4\ -device hda-duplex,id=sound0-codec0,bus=sound0.0,cad=0\ -device vfio-pci,host=02:00.0,id=hostdev0,bus=pci.0,addr=0xa,rombar=0\ -device vfio-pci,host=02:00.1,id=hostdev1,bus=pci.0,addr=0xb,rombar=0\ -device virtio-balloon-pci,id=balloon0,bus=pci.0,addr=0x7\ -msg timestamp=on Here's my xml. <domain type='kvm'> <name>Windows_10</name> <uuid>fc05f50e-8a97-4c51-a8c5-627824d8075c</uuid> <memory unit='KiB'>16779264</memory> <currentMemory unit='KiB'>16779264</currentMemory> <vcpu placement='static'>8</vcpu> <os> <type arch='x86_64' machine='pc-i440fx-2.8'>hvm</type> <loader readonly='yes' type='pflash'>/usr/share/ovmf/x64/ovmf_x64.bin</loader> <nvram>/var/lib/libvirt/qemu/nvram/Windows_10_VARS.fd</nvram> </os> <features> <acpi/> <apic/> <hyperv> <relaxed state='on'/> <vapic state='on'/> <spinlocks state='on' retries='8191'/> </hyperv> <kvm> <hidden state='on'/> </kvm> <vmport state='off'/> </features> <cpu mode='host-passthrough'> <topology sockets='8' cores='1' threads='1'/> </cpu> <clock offset='localtime'> <timer name='hypervclock' present='yes'/> </clock> destroy restart destroy <pm> <suspend-to-mem enabled='no'/> <suspend-to-disk enabled='no'/> </pm> <devices> <emulator>/usr/sbin/qemu-system-x86_64</emulator> <disk type='file' device='cdrom'> <driver name='qemu' type='raw'/> <source file='/home/makz/virtio-win-0.1.134.iso'/> <target dev='hda' bus='ide'/> <readonly/> <address type='drive' controller='0' bus='0' target='0' unit='0'/> </disk> <disk type='block' device='disk'> <driver name='qemu' type='raw' cache='writeback'/> <source dev='/dev/sdb'/> <target dev='vda' bus='virtio'/> <boot order='1'/> <address type='pci' domain='0x0000' bus='0x00' slot='0x08' function='0x0'/> </disk> <disk type='block' device='disk'> <driver name='qemu' type='raw' cache='writeback'/> <source dev='/dev/sdd'/> <target dev='vdb' bus='virtio'/> <address type='pci' domain='0x0000' bus='0x00' slot='0x09' function='0x0'/> </disk> <controller type='usb' index='0' model='nec-xhci'> <address type='pci' domain='0x0000' bus='0x00' slot='0x05' function='0x0'/> </controller> <controller type='pci' index='0' model='pci-root'/> <controller type='ide' index='0'> <address type='pci' domain='0x0000' bus='0x00' slot='0x01' function='0x1'/> </controller> <controller type='virtio-serial' index='0'> <address type='pci' domain='0x0000' bus='0x00' slot='0x0a' function='0x0'/> </controller> <interface type='bridge'> <mac address='52:54:00:88:db:2f'/> <source bridge='br0'/> <model type='virtio'/> <address type='pci' domain='0x0000' bus='0x00' slot='0x03' function='0x0'/> </interface> <channel type='spicevmc'> <target type='virtio' name='com.redhat.spice.0'/> <address type='virtio-serial' controller='0' bus='0' port='1'/> </channel> <input type='mouse' bus='ps2'/> <input type='keyboard' bus='ps2'/> <graphics type='spice' autoport='yes'> <listen type='address'/> <gl enable='no'/> </graphics> <sound model='ich6'> <address type='pci' domain='0x0000' bus='0x00' slot='0x04' function='0x0'/> </sound> <video> <model type='qxl' ram='65536' vram='65536' vgamem='16384' heads='1' primary='yes'/> <address type='pci' domain='0x0000' bus='0x00' slot='0x0b' function='0x0'/> </video> <hostdev mode='subsystem' type='pci' managed='yes'> <source> <address domain='0x0000' bus='0x02' slot='0x00' function='0x0'/> </source> <address type='pci' domain='0x0000' bus='0x00' slot='0x02' function='0x0'/> </hostdev> <hostdev mode='subsystem' type='pci' managed='yes'> <source> <address domain='0x0000' bus='0x02' slot='0x00' function='0x1'/> </source> <address type='pci' domain='0x0000' bus='0x00' slot='0x06' function='0x0'/> </hostdev> <memballoon model='virtio'> <address type='pci' domain='0x0000' bus='0x00' slot='0x07' function='0x0'/> </memballoon> </devices> </domain> I hope someone will help me :) Have a good day !