diff --git a/src/stage/gtk-lumiera.cpp b/src/stage/gtk-lumiera.cpp
index fd64a3b02..95ff85886 100644
--- a/src/stage/gtk-lumiera.cpp
+++ b/src/stage/gtk-lumiera.cpp
@@ -49,10 +49,10 @@
 #include "stage/gtk-base.hpp"
 
 #include "lib/error.hpp"
+#include "lib/thread.hpp"
 #include "stage/ui-bus.hpp"
 #include "stage/guifacade.hpp"
 #include "stage/ctrl/ui-manager.hpp"
-#include "vault/thread-wrapper.hpp"
 #include "common/subsys.hpp"
 #include "lib/nocopy.hpp"
 
@@ -65,8 +65,8 @@ extern "C" {
 
 
 
-using vault::Thread;
 using lumiera::Subsys;
+using lib::launchDetached;
 using lumiera::error::LUMIERA_ERROR_STATE;
 using stage::LUMIERA_INTERFACE_INAME(lumieraorg_Gui, 1);
 
@@ -128,28 +128,24 @@ namespace stage {
             return errorMsgBuff;
           }
       };
-    
-    
-    void
-    runGUI (Subsys::SigTerm reportOnTermination)       ///< this is the UI-Thread
-    {
-      string shutdownLog = GtkLumiera{}.run();
-      
-       // inform main thread that the GUI has been shut down...
-      reportOnTermination (&shutdownLog);
-    }//(End) GUI-Thread.
-    
+    //(End) GUI-Thread.
   }//(End) impl details
   
   
   
   
   bool
-  launchUI (Subsys::SigTerm& terminationHandle)
+  launchUI (Subsys::SigTerm& reportOnTermination)
   {
     try
       {
-        Thread {"GUI-Main", bind (&runGUI, terminationHandle)}; ///////////////////////////////////////////OOO this shows we need a self-contained and detached thread!
+        launchDetached ("GUI-Main"
+                       , [reportOnTermination]
+                            {
+                              string shutdownLog = GtkLumiera{}.run();
+                               // inform main thread that the GUI has been shut down...
+                              reportOnTermination (&shutdownLog);
+                            });
         return true; // if we reach this line...
       }
     catch(...)
diff --git a/wiki/thinkPad.ichthyo.mm b/wiki/thinkPad.ichthyo.mm
index 97422d7f6..20c77ce99 100644
--- a/wiki/thinkPad.ichthyo.mm
+++ b/wiki/thinkPad.ichthyo.mm
@@ -65010,7 +65010,7 @@
 <icon BUILTIN="button_ok"/>
 </node>
 <node BACKGROUND_COLOR="#eef0c5" COLOR="#990000" CREATED="1696468379848" ID="ID_1146069423" MODIFIED="1697054187170" TEXT="Erg&#xe4;nzung: autonomous Thread">
-<linktarget COLOR="#bc3562" DESTINATION="ID_1146069423" ENDARROW="Default" ENDINCLINATION="444;909;" ID="Arrow_ID_516910789" SOURCE="ID_137837629" STARTARROW="None" STARTINCLINATION="-1280;-32;"/>
+<linktarget COLOR="#5a83aa" DESTINATION="ID_1146069423" ENDARROW="Default" ENDINCLINATION="444;909;" ID="Arrow_ID_516910789" SOURCE="ID_137837629" STARTARROW="None" STARTINCLINATION="-1280;-32;"/>
 <icon BUILTIN="pencil"/>
 <node COLOR="#435e98" CREATED="1696468398477" ID="ID_1775921981" MODIFIED="1696966299356" TEXT="neue Anforderung: komplett abgekoppelt">
 <icon BUILTIN="yes"/>
@@ -66293,7 +66293,8 @@
 </node>
 <node BACKGROUND_COLOR="#eef0c5" COLOR="#990000" CREATED="1696893013891" ID="ID_1856740667" MODIFIED="1697068782982" TEXT="damit bestehende Probleme im Applikations-Code l&#xf6;sen">
 <icon BUILTIN="pencil"/>
-<node CREATED="1696893026770" ID="ID_253995958" MODIFIED="1696893031336" TEXT="GtkLumiera">
+<node COLOR="#338800" CREATED="1696893026770" ID="ID_253995958" MODIFIED="1697079847058" TEXT="GtkLumiera">
+<icon BUILTIN="button_ok"/>
 <node CREATED="1696893056374" MODIFIED="1696893056374" TEXT="Variante-1"/>
 </node>
 <node COLOR="#338800" CREATED="1696893037535" ID="ID_1340852722" MODIFIED="1697068777127" TEXT="OutputDirector">
@@ -81506,11 +81507,11 @@ Date:&#160;&#160;&#160;Thu Apr 20 18:53:17 2023 +0200<br/>
 </node>
 </node>
 </node>
-<node BACKGROUND_COLOR="#eee5c3" COLOR="#990000" CREATED="1696538756712" ID="ID_1037865278" LINK="#ID_1688404846" MODIFIED="1696541639911" TEXT="ThreadWrapperAutonomous_test">
-<icon BUILTIN="flag-yellow"/>
+<node COLOR="#338800" CREATED="1696538756712" ID="ID_1037865278" LINK="#ID_1688404846" MODIFIED="1697079830508" TEXT="ThreadWrapperAutonomous_test">
+<icon BUILTIN="button_ok"/>
 </node>
-<node BACKGROUND_COLOR="#eee5c3" COLOR="#990000" CREATED="1696538825003" ID="ID_1146104670" LINK="#ID_1787030725" MODIFIED="1696538953992" TEXT="ThreadWrapperLifecycle_test">
-<icon BUILTIN="flag-yellow"/>
+<node COLOR="#338800" CREATED="1696538825003" ID="ID_1146104670" LINK="#ID_1787030725" MODIFIED="1697079831677" TEXT="ThreadWrapperLifecycle_test">
+<icon BUILTIN="button_ok"/>
 </node>
 <node COLOR="#338800" CREATED="1695394753483" FOLDED="true" ID="ID_1338410455" MODIFIED="1696030309964" TEXT="SyncBarrier_test">
 <icon BUILTIN="button_ok"/>
@@ -82464,13 +82465,67 @@ Date:&#160;&#160;&#160;Thu Apr 20 18:53:17 2023 +0200<br/>
 </node>
 </node>
 </node>
-<node BACKGROUND_COLOR="#eee5c3" COLOR="#990000" CREATED="1696029465121" ID="ID_786350998" MODIFIED="1696541244997" TEXT="gtk-lumiera.cpp">
-<icon BUILTIN="flag-yellow"/>
-<node BACKGROUND_COLOR="#eee5c3" COLOR="#990000" CREATED="1696468041645" ID="ID_137837629" MODIFIED="1696541241831" TEXT="brauche einen Thread, den man in den Hintergrund schieben kann">
-<arrowlink COLOR="#bc3562" DESTINATION="ID_1146069423" ENDARROW="Default" ENDINCLINATION="444;909;" ID="Arrow_ID_516910789" STARTARROW="None" STARTINCLINATION="-1280;-32;"/>
-<icon BUILTIN="flag-yellow"/>
+<node COLOR="#338800" CREATED="1696029465121" ID="ID_786350998" MODIFIED="1697079789466" TEXT="gtk-lumiera.cpp">
+<icon BUILTIN="button_ok"/>
+<node COLOR="#338800" CREATED="1696468041645" ID="ID_137837629" MODIFIED="1697079810297" TEXT="brauche einen Thread, den man in den Hintergrund schieben kann">
+<arrowlink COLOR="#5a83aa" DESTINATION="ID_1146069423" ENDARROW="Default" ENDINCLINATION="444;909;" ID="Arrow_ID_516910789" STARTARROW="None" STARTINCLINATION="-1280;-32;"/>
+<icon BUILTIN="button_ok"/>
+<node COLOR="#5b280f" CREATED="1697074837137" ID="ID_1676366081" MODIFIED="1697079198786" TEXT="umstellen auf ein self-managed Thread-Objekt">
+<icon BUILTIN="button_cancel"/>
+<node CREATED="1697074871061" ID="ID_1947484765" MODIFIED="1697074877752" TEXT="die stateische Methode runGUI f&#xe4;llt weg"/>
+<node CREATED="1697074879331" ID="ID_1600154985" MODIFIED="1697074890470" TEXT="daf&#xfc;r erbt GtkLumiera nun von ThreadHookable"/>
+<node CREATED="1697074891490" ID="ID_1903908027" MODIFIED="1697074909875" TEXT="mu&#xdf; unbedingt eine Sync-Barrier einziehen">
+<node CREATED="1697074911127" ID="ID_359674865" MODIFIED="1697074931129" TEXT="sonst sind die GUI-Komponenten nicht rechtzeitig fertig"/>
+<node CREATED="1697074933422" ID="ID_1367938500" MODIFIED="1697074943014" TEXT="vor allem werden hier noch dynamische Libs geladen">
+<icon BUILTIN="messagebox_warning"/>
 </node>
-<node CREATED="1696468692302" ID="ID_1299573982" MODIFIED="1697068881651" TEXT="SteamDispatcher und OutputDirector brauchen das ebenso">
+<node COLOR="#5b280f" CREATED="1697074948090" ID="ID_1670658341" MODIFIED="1697074961262" TEXT="SyncBarrier als Parameter &#xfc;bergeben">
+<icon BUILTIN="button_cancel"/>
+</node>
+<node CREATED="1697074962089" ID="ID_1822899395" MODIFIED="1697074967947" TEXT="stattdessen als globale Variable"/>
+</node>
+<node BACKGROUND_COLOR="#d1bba1" COLOR="#990000" CREATED="1697074973343" ID="ID_1959135730" MODIFIED="1697079190318" TEXT="Probleme beim Shutdown">
+<icon BUILTIN="broken-line"/>
+<node CREATED="1697074982953" ID="ID_442353467" MODIFIED="1697075045858" TEXT="anscheinend werden Teile des GUI erst  nach dem Ende von Lumiera-Main abgebaut">
+<icon BUILTIN="info"/>
+</node>
+<node CREATED="1697079081169" ID="ID_265281556" MODIFIED="1697079119273" TEXT="das hei&#xdf;t: sigTerm wurde zu fr&#xfc;h aufgerufen &#x27f9; Kontrakt gebrochen"/>
+<node BACKGROUND_COLOR="#e0ceaa" COLOR="#690f14" CREATED="1697079120028" ID="ID_1679819691" MODIFIED="1697079140133">
+<richcontent TYPE="NODE"><html>
+  <head/>
+  <body>
+    <p>
+      das ist jetzt alles <b>keine Verbesserung</b>
+    </p>
+  </body>
+</html></richcontent>
+<icon BUILTIN="stop-sign"/>
+</node>
+</node>
+</node>
+<node COLOR="#435e98" CREATED="1697079202857" ID="ID_1873620369" MODIFIED="1697079742143" TEXT="die alte L&#xf6;sung war gar nicht so schlecht">
+<icon BUILTIN="idea"/>
+<node CREATED="1697079212001" ID="ID_358578864" MODIFIED="1697079225323">
+<richcontent TYPE="NODE"><html>
+  <head/>
+  <body>
+    <p>
+      sie sieht blo&#223; &#187;umst&#228;ndlich&#171; aus
+    </p>
+  </body>
+</html></richcontent>
+</node>
+<node CREATED="1697079226102" ID="ID_1747368145" MODIFIED="1697079235936" TEXT="der Vorteil: die Reihenfolge ist explizit festgelegt"/>
+<node CREATED="1697079242804" ID="ID_440022982" MODIFIED="1697079265220" TEXT="der Thread umschlie&#xdf;t die gesamte GUI-Funktionalit&#xe4;t"/>
+</node>
+<node COLOR="#338800" CREATED="1697079753844" ID="ID_1211321573" MODIFIED="1697079778251" TEXT="Umstellung: runGUI &#x27f6; in &#x3bb; packen">
+<icon BUILTIN="button_ok"/>
+</node>
+<node COLOR="#338800" CREATED="1697079779058" ID="ID_370018589" MODIFIED="1697079784793" TEXT="tut">
+<icon BUILTIN="ksmiletris"/>
+</node>
+</node>
+<node COLOR="#435e98" CREATED="1696468692302" ID="ID_1299573982" MODIFIED="1697079748206" TEXT="SteamDispatcher und OutputDirector brauchen das ebenso">
 <arrowlink COLOR="#1f9fe7" DESTINATION="ID_871343805" ENDARROW="Default" ENDINCLINATION="173;10;" ID="Arrow_ID_1685700346" STARTARROW="None" STARTINCLINATION="-8;8;"/>
 </node>
 </node>