win amd GPU passtrough

portainer-compose-stacks/windows/fix-grub-iommu.sh

@@ -0,0 +1,43 @@
+#!/bin/bash
+
+# Fix GRUB IOMMU conflict - remove amd_iommu=off that's blocking the passthrough
+
+set -e
+
+if [ "$EUID" -ne 0 ]; then 
+    echo "Please run as root: sudo $0"
+    exit 1
+fi
+
+echo "=== Fixing GRUB IOMMU Configuration ==="
+echo ""
+
+GRUB_FILE="/etc/default/grub"
+
+# Backup
+cp "$GRUB_FILE" "$GRUB_FILE.backup.$(date +%Y%m%d-%H%M%S)"
+echo "✓ Backup created"
+
+# Remove the conflicting amd_iommu=off
+sed -i 's/ amd_iommu=off//' "$GRUB_FILE"
+
+echo "✓ Removed amd_iommu=off from GRUB config"
+echo ""
+echo "New GRUB_CMDLINE_LINUX_DEFAULT:"
+grep "GRUB_CMDLINE_LINUX_DEFAULT" "$GRUB_FILE"
+echo ""
+
+# Update GRUB
+echo "Updating GRUB..."
+update-grub
+
+echo ""
+echo "=== Fix Complete ==="
+echo ""
+echo "⚠️  REBOOT NOW to apply changes: sudo reboot"
+echo ""
+echo "After reboot, verify with:"
+echo "  ./verify-gpu-passthrough.sh"
+
+
+