GPU passthrough no output

I followed this guide to setup a vm with pci passthrough.

My setup:

• MSI Z170 Gaming M7

• i7-6700K

• GTX1080[Host]

• RX580[Guest]

I can confirm that the GPU is isolated correctly and uses vfio. When I start the machine through virt-manager it seems to start(allocating RAM and CPU usage), but when I switch the monitor to HDMI source I get a no signal message.

Similar using this script

#!/bin/bash cp /usr/share/edk2.git/ovmf-x64/OVMF_VARS-pure-efi.fd /tmp/my_vars.fd qemu-system-x86_64  -enable-kvm  -m 2048  -cpu host,kvm=off  -vga none  -device vfio-pci,host=02:00.0,multifunction=on  -device vfio-pci,host=02:00.1  -drive if=pflash,format=raw,readonly,file=/usr/share/edk2.git/ovmf-x64/OVMF_CODE-pure-efi.fd  -drive if=pflash,format=raw,file=/tmp/my_vars.fd

opens the qemu console on my host machine.
Help is really appreciated!