battery: be firmer about shutdown

'halt' doesn't seem to work, so use 'poweroff -f'

diff --git a/utils/battery.py b/utils/battery.py
index f3a708233713c62a6d27847be57d0de436dc833f..d2d2d9b67a1013596efd7bf87e11f302d14542ce 100755 (executable)
--- a/utils/battery.py
+++ b/utils/battery.py
@@ -270,7 +270,8 @@ class BatteryConfig(gtk.Window):
         return flight
 
     def shutdown(self, widget):
-        os.system("halt")
+        os.system("sync")
+        os.system("poweroff -f")
         
 
     def update_labels(self, *a):