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+
+qemu cannot run twice
+
+After using qemu with gpu passthrough and then shutting down windows 7 properly I cannot boot windows 7 a second time.
+Only a full reboot of linux fixes this issue.
+Qemu appears to corrupt something in linux when exiting.
+I get no error messages but windows 7 never finishes booting during the 2nd try.
+Apparently I do try to run vfiobind each time the script is run.
+Wondering if rerunning vfiobind can cause an issue?
+
+
+My specs:
+-----------------------------------------------------------------------------------------
+System:    Host: GT70-2PE Kernel: 4.5.4-040504-generic x86_64 (64 bit gcc: 5.3.1)
+           Desktop: Cinnamon 3.2.7 (Gtk 3.18.9) Distro: Linux Mint 18.1 Serena
+Machine:   Mobo: Micro-Star model: MS-1763 v: REV:0.C Bios: American Megatrends v: E1763IMS.51B date: 01/29/2015
+CPU:       Quad core Intel Core i7-4810MQ (-HT-MCP-) cache: 6144 KB
+           flags: (lm nx sse sse2 sse3 sse4_1 sse4_2 ssse3 vmx) bmips: 22347
+           clock speeds: max: 2801 MHz 1: 2801 MHz 2: 2801 MHz 3: 2801 MHz 4: 2801 MHz 5: 2801 MHz 6: 2801 MHz
+           7: 2801 MHz 8: 2801 MHz
+Graphics:  Card-1: Intel 4th Gen Core Processor Integrated Graphics Controller bus-ID: 00:02.0
+           Card-2: NVIDIA GK104M [GeForce GTX 880M] bus-ID: 01:00.0
+           Display Server: X.Org 1.18.4 drivers: intel (unloaded: fbdev,vesa)
+           Resolution: 1920x1080@60.02hz, 1920x1080@60.00hz
+           GLX Renderer: Mesa DRI Intel Haswell Mobile GLX Version: 3.0 Mesa 12.0.6 Direct Rendering: Yes
+
+
+My script:
+-------------------------------------------------------------------------------------------
+#!/bin/bash
+
+cd ~/qemu
+sudo ./up.sh tap0
+
+configfile=~/qemu/vfio-pci1.cfg
+
+vfiobind() {
+    dev="$1"
+        vendor=$(cat /sys/bus/pci/devices/$dev/vendor)
+        device=$(cat /sys/bus/pci/devices/$dev/device)
+        if [ -e /sys/bus/pci/devices/$dev/driver ]; then
+                echo $dev > /sys/bus/pci/devices/$dev/driver/unbind
+        fi
+        echo $vendor $device > /sys/bus/pci/drivers/vfio-pci/new_id
+
+}
+
+modprobe vfio-pci
+
+cat $configfile | while read line;do
+    echo $line | grep ^# >/dev/null 2>&1 && continue
+        vfiobind $line
+done
+
+sudo qemu-system-x86_64 -machine type=q35,accel=kvm -cpu host,kvm=off \
+-smp 8,sockets=1,cores=4,threads=2 \
+-bios /usr/share/seabios/bios.bin \
+-serial none \
+-parallel none \
+-vga none \
+-m 4G \
+-mem-path /run/hugepages/kvm \
+-mem-prealloc \
+-balloon none \
+-rtc clock=host,base=localtime \
+-device ioh3420,bus=pcie.0,addr=1c.0,multifunction=on,port=1,chassis=1,id=root.1 \
+-device vfio-pci,host=01:00.0,bus=root.1,addr=00.0,multifunction=on,x-vga=on \
+-device virtio-scsi-pci,id=scsi \
+-drive id=disk0,if=virtio,cache=none,format=raw,file=/home/dad/qemu/windows7.img \
+-drive file=/home/dad/1TB-Backup/Iso/SP1ForWin7.iso,id=isocd,format=raw,if=none -device scsi-cd,drive=isocd \
+-net nic -net tap,ifname=tap0,script=no,downscript=no \
+-usbdevice host:413c:a503 \
+-usbdevice host:13fe:3100 \
+-usbdevice host:0bc2:ab21 \
+-boot menu=on \
+-boot order=c
+
+sudo ./down.sh tap0
+
+exit 0
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