Send monitor layout at VM startup.

Gui daemon isn't aware of multihead parameters, also gui protocol
doesn't support such information - currently by design it is configured
via Qubes RPC service.
At GUI startup send monitor layout to the VM.

core-modules/000QubesVm.py

@@ -1344,6 +1344,14 @@ class QubesVm(object):
         if (retcode != 0) :
             raise QubesException("Cannot start qubes-guid!")
 
+        if verbose:
+            print >> sys.stderr, "--> Sending monitor layout..."
+
+        try:
+            subprocess.call([system_path["monitor_layout_notify_cmd"], self.name])
+        except Exception as e:
+            print >>sys.stderr, "ERROR: %s" % e
+
         if verbose:
             print >> sys.stderr, "--> Waiting for qubes-session..."
 

core/qubes.py

@@ -61,6 +61,7 @@ system_path = {
 
     'qubes_pciback_cmd': '/usr/lib/qubes/unbind-pci-device.sh',
     'prepare_volatile_img_cmd': '/usr/lib/qubes/prepare-volatile-img.sh',
+    'monitor_layout_notify_cmd': '/usr/bin/qubes-monitor-layout-notify',
 }
 
 vm_files = {