1 files changed, 13 insertions, 7 deletions

diff --git a/scripts/qemucommand.py b/scripts/qemucommand.py
index 8b7da2b..df6907c 100644
--- a/scripts/qemucommand.py
+++ b/scripts/qemucommand.py
@@ -1,4 +1,4 @@
-from os.path import exists, join, realpath, abspath
+from os.path import exists, isdir, join, realpath, abspath
 from os import listdir
 import random
 import socket
@@ -42,6 +42,8 @@ class QemuCommand(object):
         if args.machine:
             self.machine = args.machine
         else:
+            if not isdir(args.dir):
+                raise ValueError("Directory %s does not exist, please specify a --machine or a valid images directory" % args.dir)
             machines = listdir(args.dir)
             if len(machines) == 1:
                 self.machine = machines[0]
@@ -100,12 +102,8 @@ class QemuCommand(object):
         cmdline += [
             "-serial", "tcp:127.0.0.1:%d,server,nowait" % self.serial_port,
             "-m", self.mem,
-            "-usb",
             "-object", "rng-random,id=rng0,filename=/dev/urandom",
             "-device", "virtio-rng-pci,rng=rng0",
-            "-device", "usb-tablet",
-            "-show-cursor",
-            "-vga", "std",
             "-net", netuser,
             "-net", "nic,macaddr=%s" % self.mac_address
         ]
@@ -117,9 +115,17 @@ class QemuCommand(object):
                 '-device', 'e1000,netdev=vlan1,mac='+random_mac(),
             ]
         if self.gui:
-            cmdline += ["-serial", "stdio"]
+            cmdline += [
+                    "-usb",
+                    "-device", "usb-tablet",
+                    "-show-cursor",
+                    "-vga", "std"
+            ]
         else:
-            cmdline.append('-nographic')
+            cmdline += [
+                    "-nographic",
+                    "-monitor", "null",
+            ]
         if self.kvm:
             cmdline += ['-enable-kvm', '-cpu', 'host']
         else: