XF86PowerOff cannot be bound under Xubuntu 15.04

.xbindkeysrc

@@ -38,32 +38,27 @@
 #fullscreen on/off
 "wmctrl -r :ACTIVE: -b toggle,fullscreen"
     m:0x40 + c:70
-    Mod4 + F4 
+    Mod4 + F4
 
 #window chooser
 "admit1 skippy-xd"
     m:0x0 + c:250
-    XF86ApplicationRight 
-
-#lock screen
-"xlock"
-    m:0x4 + c:124
-    Control + XF86PowerOff 
+    XF86ApplicationRight
 
 #dock laptop
 "acer-c720-docking"
-    m:0x8 + c:124
-    Alt + XF86PowerOff 
+    m:0x4 + c:235
+    Control + XF86Display
 
 #invert colors
 "xcalib -invert -alter"
-    m:0x1 + c:124
-    Shift + XF86PowerOff 
+    m:0x8 + c:235
+    Alt + XF86Display
 
 #touchpad on/off
 "synclient TouchpadOff=$(synclient | grep -c 'TouchpadOff.*0')"
-    m:0xc + c:124
-    Control+Alt + XF86PowerOff 
+    m:0x4 + c:250
+    Control + XF86ApplicationRight
 
 #
 # End of xbindkeys configuration