[libvirt-users] Qemu guest display black after reboot

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>