gnome-boxes-disable-spice-usb.patch

--- gnome-boxes-5/src/spice-display.vala~	2017-07-20 19:01:57.817177298 +0100
+++ gnome-boxes-5/src/spice-display.vala	2017-07-20 19:24:55.686539194 +0100
@@ -1,7 +1,7 @@
 // This file is part of GNOME Boxes. License: LGPLv2+
 using Gtk;
 using Spice;
-using LibUSB;
+//using LibUSB;
 
 private class Boxes.SpiceDisplay: Boxes.Display {
     public override string protocol { get { return "SPICE"; } }
@@ -54,6 +54,7 @@
         gtk_session = GtkSession.get (session);
 
         Spice.set_session_option (session);
+#if 0        
         try {
             var manager = UsbDeviceManager.get (session);
 
@@ -65,6 +66,7 @@
             });
         } catch (GLib.Error error) {
         }
+#endif
     }
 
     private Spice.MainChannel? _main_channel;
@@ -173,14 +175,16 @@
     }
 
     public override bool should_keep_alive () {
+#if 0
         try {
             var manager = UsbDeviceManager.get (session);
             var devs = get_usb_devices (manager);
 
             return (!closed && (devs.length > 0));
         } catch (GLib.Error error) {
+#endif        
             return false;
-        }
+//        }
     }
 
     public override void set_enable_audio (bool enable) {
@@ -207,6 +211,7 @@
             builder.append_printf ("Agent: %s\n", main_channel.agent_connected ? "connected" : "disconnected");
         }
 
+#if 0
         try {
             var manager = UsbDeviceManager.get (session);
             var devs = manager.get_devices ();
@@ -217,6 +222,7 @@
             }
         } catch (GLib.Error error) {
         }
+#endif
     }
 
     public override void connect_it (owned Display.OpenFDFunc? open_fd = null) {
@@ -338,6 +344,7 @@
             if (!connected)
                 break;
 
+#if 0
             try {
                 var manager = UsbDeviceManager.get (session);
                 var devs = get_usb_devices (manager);
@@ -407,6 +414,7 @@
                 });
             } catch (GLib.Error error) {
             }
+#endif
             break;
         }
 
@@ -420,6 +428,7 @@
         display.send_keys (keyvals, DisplayKeyEvent.CLICK);
     }
 
+#if 0
     private GLib.GenericArray<UsbDevice> get_usb_devices (UsbDeviceManager manager) {
         GLib.GenericArray<UsbDevice> ret = new GLib.GenericArray<UsbDevice> ();
         var devs = manager.get_devices ();
@@ -492,6 +501,7 @@
 
         return ret;
     }
+#endif
 }
 
 private class Boxes.SpiceChannelHandler : GLib.Object {