diff -Nru kdebase-workspace-4.6.2a/debian/changelog kdebase-workspace-4.6.2a/debian/changelog
--- kdebase-workspace-4.6.2a/debian/changelog   2011-04-08 16:35:06.000000000 +0200
+++ kdebase-workspace-4.6.2a/debian/changelog   2011-04-09 22:46:29.000000000 +0200
@@ -1,3 +1,10 @@
+kdebase-workspace (4:4.6.2a-0ubuntu4) natty; urgency=low
+
+  * Add kubuntu_121_kdm_halt_cmd.diff imported from upstream
+    upstream, bugs.kde.org/270228, LP:755570
+
+ -- Romain Perier <romain.perier@gmail.com>  Sat, 09 Apr 2011 22:44:36 +0200
+
 kdebase-workspace (4:4.6.2a-0ubuntu3) natty; urgency=low
 
   * Add kubuntu_120_ksysguard_sensors.diff recommended by ksysguard
diff -Nru kdebase-workspace-4.6.2a/debian/patches/kubuntu_121_kdm_halt_cmd.diff kdebase-workspace-4.6.2a/debian/patches/kubuntu_121_kdm_halt_cmd.diff
--- kdebase-workspace-4.6.2a/debian/patches/kubuntu_121_kdm_halt_cmd.diff       1970-01-01 01:00:00.000000000 +0100
+++ kdebase-workspace-4.6.2a/debian/patches/kubuntu_121_kdm_halt_cmd.diff       2011-04-09 22:43:47.000000000 +0200
@@ -0,0 +1,22 @@
+Author: Oswald Buddenhagen <ossi@kde.org>
+KDE:270228
+LP:755570
+
+linux shutdown wants -P instead of -p (also -P requires -h)
+
+Index: kdebase-workspace-4.6.2a/kdm/config.def
+===================================================================
+--- kdebase-workspace-4.6.2a.orig/kdm/config.def       2011-04-09 22:23:17.000000000 +0200
++++ kdebase-workspace-4.6.2a/kdm/config.def    2011-04-09 22:43:39.658426717 +0200
+@@ -37,7 +37,10 @@
+ #ifdef _AIX
+ # define HALT_CMD     "/usr/sbin/shutdown -h now"
+ # define REBOOT_CMD   "/usr/sbin/shutdown -r now"
+-#elif defined(BSD) || defined(__linux__)
++#elif defined(__linux__)
++# define HALT_CMD     "/sbin/shutdown -h -P now"
++# define REBOOT_CMD   "/sbin/shutdown -r now"
++#elif defined(BSD)
+ # define HALT_CMD     "/sbin/shutdown -p now"
+ # define REBOOT_CMD   "/sbin/shutdown -r now"
+ #elif defined(__SVR4)
diff -Nru kdebase-workspace-4.6.2a/debian/patches/series kdebase-workspace-4.6.2a/debian/patches/series
--- kdebase-workspace-4.6.2a/debian/patches/series      2011-04-08 16:35:05.000000000 +0200
+++ kdebase-workspace-4.6.2a/debian/patches/series      2011-04-09 22:43:18.000000000 +0200
@@ -29,3 +29,4 @@
 kubuntu_118_upstart_session_events.diff
 kubuntu_119_remove_empty_librarypath_key.diff
 kubuntu_120_ksysguard_sensors.diff
+kubuntu_121_kdm_halt_cmd.diff