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[Qemu-block] Qemu guest display black after reboot

From: Allence
Subject: [Qemu-block] Qemu guest display black after reboot
Date: Mon, 6 Aug 2018 18:11:25 +0800 (CST)

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:
    <qemu:arg value='-device'/>
    <qemu:arg value='vfio-pci,host=0000:01:00.0,romfile=/root/rom.file,multifunction=on,x-vga=on'/>


      <hidden state='on'/>


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