kvm does not crash nbd is dead

slapos/recipe/kvm/template/kvm_run.in

@@ -8,7 +8,7 @@ fi
 
 # TODO: -net nic,model=virtio, but OS installer has to provide the virtio_net
 # module
-exec %(qemu_path)s \
+%(qemu_path)s \
   -net nic,macaddr=%(mac_address)s \
   -smp %(smp_count)s \
   -m %(ram_size)s \
@@ -20,3 +20,18 @@ exec %(qemu_path)s \
   -pidfile %(pid_file_path)s \
   -no-kvm
  # -net tap,ifname=%(tap_interface)s,script=no,downscript=no \
+
+if [ $? -eq 1 ]
+then
+%(qemu_path)s \
+  -net nic,macaddr=%(mac_address)s \
+  -net tap,ifname=%(tap_interface)s,script=no,downscript=no \
+  -smp %(smp_count)s \
+  -m %(ram_size)s \
+  -drive file=%(disk_path)s,if=virtio,boot=on \
+  -vnc %(vnc_ip)s:1,ipv4,password \
+  -boot menu=on \
+  -qmp unix:%(socket_path)s,server \
+  -pidfile %(pid_file_path)s
+  -no-kvm
+fi