Win11 VM running (shutdown) Issue using GPU Pass through

[matrixx]

what is the best way to write a script that will force shutdown a windows 11 vm with passthrough and then invoke the post-stop section in the hookscript? I have tried several ways and cant keep to get the vm to stop after shutdown. Here is what my hookscript looks like.

#!/usr/bin/perl

# Exmple hook script for PVE guests (hookscript config option)
# You can set this via pct/qm with
# pct set <vmid> -hookscript <volume-id>
# qm set <vmid> -hookscript <volume-id>
# where <volume-id> has to be an executable file in the snippets folder
# of any storage with directories e.g.:
# qm set 100 -hookscript local:snippets/hookscript.pl

use strict;
use warnings;

print "GUEST HOOK: " . join(' ', @ARGV). "\n";

# First argument is the vmid

my $vmid = shift;

# Second argument is the phase

my $phase = shift;

if ($phase eq 'pre-start') {

    # Stop display manager
    system("systemctl stop display-manager.service");

    # Unbind Consoles
    system("echo 0 > /sys/class/vtconsole/vtcon0/bind");
    system("echo 0 > /sys/class/vtconsole/vtcon1/bind");

    # Avoid a Race condition by waiting 2 seconds. This can be calibrated to be>
    sleep 2;

    # Remove AMDGPU Kernel Module
    system("modprobe -r amdgpu");

    # Unbind the GPU from display driver
    system("virsh nodedev-detach pci_0000_03_00_0");
    system("virsh nodedev-detach pci_0000_03_00_1");

    #Make the System Sleep 5 Seconds to give PC time to detach correctly
    system("rtcwake -m mem -s 5");

    # Load VFIO Kernel Module
    system("modprobe vfio");
    system("modprobe vfio_pci");
    system("modprobe vfio_iommu_type1");