diff --git a/debian/lenny/kdebase/debian/kdm-trinity.postinst b/debian/lenny/kdebase/debian/kdm-trinity.postinst
index 8c879be02..c787b37a3 100644
--- a/debian/lenny/kdebase/debian/kdm-trinity.postinst
+++ b/debian/lenny/kdebase/debian/kdm-trinity.postinst
@@ -9,6 +9,10 @@ set -e
 # does not exist
 DEFAULT_DISPLAY_MANAGER_FILE=/etc/X11/default-display-manager
 
+if [ -e "$DEFAULT_DISPLAY_MANAGER_FILE.dpkg-tmp" ]; then
+  cp -Rp "$DEFAULT_DISPLAY_MANAGER_FILE.dpkg-tmp" "$DEFAULT_DISPLAY_MANAGER_FILE"
+fi
+
 if [ ! -e "$DEFAULT_DISPLAY_MANAGER_FILE" ]; then
   DEFAULT_DISPLAY_MANAGER=kdm-trinity
   if db_get shared/default-x-display-manager; then
diff --git a/debian/squeeze/kdebase/debian/kdm-trinity.postinst b/debian/squeeze/kdebase/debian/kdm-trinity.postinst
index 8c879be02..c787b37a3 100644
--- a/debian/squeeze/kdebase/debian/kdm-trinity.postinst
+++ b/debian/squeeze/kdebase/debian/kdm-trinity.postinst
@@ -9,6 +9,10 @@ set -e
 # does not exist
 DEFAULT_DISPLAY_MANAGER_FILE=/etc/X11/default-display-manager
 
+if [ -e "$DEFAULT_DISPLAY_MANAGER_FILE.dpkg-tmp" ]; then
+  cp -Rp "$DEFAULT_DISPLAY_MANAGER_FILE.dpkg-tmp" "$DEFAULT_DISPLAY_MANAGER_FILE"
+fi
+
 if [ ! -e "$DEFAULT_DISPLAY_MANAGER_FILE" ]; then
   DEFAULT_DISPLAY_MANAGER=kdm-trinity
   if db_get shared/default-x-display-manager; then
diff --git a/ubuntu/maverick/kdebase/debian/kdm-trinity.postinst b/ubuntu/maverick/kdebase/debian/kdm-trinity.postinst
index 65747f681..04c8a9af8 100644
--- a/ubuntu/maverick/kdebase/debian/kdm-trinity.postinst
+++ b/ubuntu/maverick/kdebase/debian/kdm-trinity.postinst
@@ -9,6 +9,10 @@ set -e
 # does not exist
 DEFAULT_DISPLAY_MANAGER_FILE=/etc/X11/default-display-manager
 
+if [ -e "$DEFAULT_DISPLAY_MANAGER_FILE.dpkg-tmp" ]; then
+  cp -Rp "$DEFAULT_DISPLAY_MANAGER_FILE.dpkg-tmp" "$DEFAULT_DISPLAY_MANAGER_FILE"
+fi
+
 if [ ! -e "$DEFAULT_DISPLAY_MANAGER_FILE" ]; then
   DEFAULT_DISPLAY_MANAGER=kdm-trinity
   if db_get shared/default-x-display-manager; then