Hey, every friend. I have a question. My guests are not working, unbelievable.
I can use it the first time I use it. But after I close my guest and start over, my guests will not appear. My screen is black.

My environment:
  Guest: windows 10
  vm-bios: ovmf
  host: ubuntu 1604
  qemu: 2.12
  libvirt: 4.2
  kernel: 4.17.2
 
xml config:
  gpu:  
 <qemu:commandline>
    <qemu:arg value='-device'/>
    <qemu:arg value='vfio-pci,host=0000:01:00.0,romfile=/root/rom.file,multifunction=on,x-vga=on'/>
  </qemu:commandline>

features:

    <kvm>
      <hidden state='on'/>
    </kvm>