Fix TDM crash on certain systems when Plymouth is enabled

This resolves Bug 1453

ubuntu/maverick/tdebase/debian/tdm-trinity.conf

@@ -21,17 +21,21 @@ emits desktop-session-start
 emits desktop-shutdown
 
 script
-    [ ! -f /etc/X11/default-display-manager -o "$(cat /etc/X11/default-display-manager 2>/dev/null)" = "/opt/trinity/bin/tdm" ]
-
-    # Check kernel command-line for inhibitors
-    for ARG in $(cat /proc/cmdline)
-    do
-        case "${ARG}" in
-            text|-s|s|S|single)
-                exit 0
-                ;;
-        esac
-    done
+    if [ -n "$UPSTART_EVENTS" ]
+    then
+        [ ! -f /etc/X11/default-display-manager -o "$(cat /etc/X11/default-display-manager 2>/dev/null)" = "/opt/trinity/bin/tdm" ] || { stop; exit 0; }
+
+        # Since we have no plymouth integration to take over the VT we simply
+        # quit plymouth all the time. Note that sleeping appears necessary
+        # as the VT freeing is somewhat delayed and TDM would otherwise go
+        # to configured KVT+1 (if plymouth was using it).
+        $(plymouth --quit && plymouth --wait && sleep 1) || :
+        if [ "$RUNLEVEL" = S -o "$RUNLEVEL" = 1 ]
+        then
+            # Single-user mode
+            exit 0
+        fi
+    fi
 
     if [ -r /etc/default/locale ]; then
 	. /etc/default/locale

ubuntu/precise/tdebase/debian/tdm-trinity.conf

@@ -21,17 +21,21 @@ emits desktop-session-start
 emits desktop-shutdown
 
 script
-    [ ! -f /etc/X11/default-display-manager -o "$(cat /etc/X11/default-display-manager 2>/dev/null)" = "/opt/trinity/bin/tdm" ]
-
-    # Check kernel command-line for inhibitors
-    for ARG in $(cat /proc/cmdline)
-    do
-        case "${ARG}" in
-            text|-s|s|S|single)
-                exit 0
-                ;;
-        esac
-    done
+    if [ -n "$UPSTART_EVENTS" ]
+    then
+        [ ! -f /etc/X11/default-display-manager -o "$(cat /etc/X11/default-display-manager 2>/dev/null)" = "/opt/trinity/bin/tdm" ] || { stop; exit 0; }
+
+        # Since we have no plymouth integration to take over the VT we simply
+        # quit plymouth all the time. Note that sleeping appears necessary
+        # as the VT freeing is somewhat delayed and TDM would otherwise go
+        # to configured KVT+1 (if plymouth was using it).
+        $(plymouth --quit && plymouth --wait && sleep 1) || :
+        if [ "$RUNLEVEL" = S -o "$RUNLEVEL" = 1 ]
+        then
+            # Single-user mode
+            exit 0
+        fi
+    fi
 
     if [ -r /etc/default/locale ]; then
 	. /etc/default/locale

ubuntu/raring/tdebase/debian/tdm-trinity.conf

@@ -21,17 +21,21 @@ emits desktop-session-start
 emits desktop-shutdown
 
 script
-    [ ! -f /etc/X11/default-display-manager -o "$(cat /etc/X11/default-display-manager 2>/dev/null)" = "/opt/trinity/bin/tdm" ]
-
-    # Check kernel command-line for inhibitors
-    for ARG in $(cat /proc/cmdline)
-    do
-        case "${ARG}" in
-            text|-s|s|S|single)
-                exit 0
-                ;;
-        esac
-    done
+    if [ -n "$UPSTART_EVENTS" ]
+    then
+        [ ! -f /etc/X11/default-display-manager -o "$(cat /etc/X11/default-display-manager 2>/dev/null)" = "/opt/trinity/bin/tdm" ] || { stop; exit 0; }
+
+        # Since we have no plymouth integration to take over the VT we simply
+        # quit plymouth all the time. Note that sleeping appears necessary
+        # as the VT freeing is somewhat delayed and TDM would otherwise go
+        # to configured KVT+1 (if plymouth was using it).
+        $(plymouth --quit && plymouth --wait && sleep 1) || :
+        if [ "$RUNLEVEL" = S -o "$RUNLEVEL" = 1 ]
+        then
+            # Single-user mode
+            exit 0
+        fi
+    fi
 
     if [ -r /etc/default/locale ]; then
 	. /etc/default/locale