[vfio-users] No screen while boot up VM

[Eddie Yen]

Hello, guys,
I got another problem when trying boot up VM on real server.

The server is Dell PowerEdge R720 /w E5-2620v2 dual CPU (24 threads total)
Host OS is Ubuntu 14.04.3 /w Linux Kernel 4.3
And QEMU is 2.4.1 /w Hyper-V patch.

I tried to mount Quadro K420 into VM and install Windows 7
But when I launch VM by using QEMU command, I got nothing in my screen.

Here is my QEMU command:

#!/bin/bash

qemu-system-x86_64 -enable-kvm -M q35 -m 8192 -cpu host,kvm=off \
-smp 4,sockets=1,cores=4,threads=1 \
-bios /usr/share/qemu/bios.bin -vga none -nographic -localtime \
-device
ioh3420,bus=pcie.0,addr=1c.0,multifunction=on,port=1,chassis=1,id=root.1 \
-device
vfio-pci,host=42:00.0,bus=root.1,addr=00.0,multifunction=on,x-vga=on \
-device vfio-pci,host=42:00.1,bus=root.1,addr=00.1 \
-device ahci,bus=pcie.0,id=ahci \
-drive file=/root/win7.img,id=disk,format=raw,if=virtio \
-drive file=/root/win7.iso,id=isocd,if=none -device
ide-cd,bus=ahci.0,drive=isocd \
-drive file=/root/virt.iso,id=isocd2,if=none -device
ide-cd,bus=ahci.1,drive=isocd2


lspci
http://pastebin.com/auKLbhuK

iommu_group
http://pastebin.com/SMuBWveh

ispci -vvv
http://pastebin.com/AXaJHrBF

This server also installed OpenStack, and being as compute node.
I'm not sure that OpenStack may disturb or not. Or maybe just script
problem.

Many thanks,
Eddie
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