Describe the bug
With virtio-vga device as the displaying device, when the guest crashes and does the memory dump, the BSOD screen doesn't show up. However, the crashdump file is generated successfully.

To Reproduce
Boot the Windows VM with qemu arguments "-vga virtio" or "-device virtio-vga"
Trigger the crash of Windows VM
Check the BSOD screen

Expected behavior
The BSOD screen should show properly

Screenshots
Black screen shows when the guest dumps the memory.

For more information please visit 

https://github.com/virtio-win/kvm-guest-drivers-windows/issues/1057