--- lcl/interfaces/gtk2/gtk2winapi.inc
+++ lcl/interfaces/gtk2/gtk2winapi.inc
@@ -1866,6 +1866,13 @@
     Result := RegionType(D);
     //DebugLn('TGtk2WidgetSet.CombineRgn B Mode=',dbgs(fnCombineMode),
     //  ' S1=',GDKRegionAsString(S1),' S2=',GDKRegionAsString(S2),' D=',GDKRegionAsString(D),'');
+    if (Result = NullRegion) and
+      ((RegionType(S1) <> NullRegion) or ((RegionType(S2) <> NullRegion))) then
+    begin
+      DeleteObject(Dest);
+      Dest := CreateEmptyRegion;
+      Result := RegionType(D);
+    end;
   end;
 end;
 
@@ -7537,7 +7544,7 @@
   DevCtx: TGtkDeviceContext absolute DC;
 
   SavedDevCtx: TGtkDeviceContext;
-  ClipRegionChanged: Boolean;
+//  ClipRegionChanged: Boolean;
 begin
   if not IsValidDC(DC) then Exit(False);
   if SavedDC <= 0 then Exit(False);
@@ -7548,14 +7555,14 @@
 
     // TODO copy bitmap too
 
-    ClipRegionChanged := DevCtx.ClipRegion <> SavedDevCtx.ClipRegion;
-    
+//    ClipRegionChanged := DevCtx.ClipRegion <> SavedDevCtx.ClipRegion;
+
     // clear the GDIObjects in pSavedDC, so they are not freed by DeleteDC
     Result := DevCtx.CopyDataFrom(SavedDevCtx, True, True, True);
     DevCtx.SavedContext := SavedDevCtx.SavedContext;
     SavedDevCtx.SavedContext := nil;
 
-    if ClipRegionChanged then
+//    if ClipRegionChanged then
       DevCtx.SelectRegion;
 
     // free saved DC
--- lcl/interfaces/gtk2/gtk2widgetset.inc
+++ lcl/interfaces/gtk2/gtk2widgetset.inc
@@ -6046,10 +6046,24 @@
 function TGtk2WidgetSet.CreateEmptyRegion: hRGN;
 var
   GObject: PGdiObject;
+  R: TGDKRectangle;
+  RegionObj: PGdkRegion;
+  RRGN: PGDKRegion;
 begin
   GObject := NewGDIObject(gdiRegion);
-  GObject^.GDIRegionObject := gdk_region_new;
+  R.x := -1;
+  R.y := -1;
+  R.width := 1;
+  R.height := 1;
+  RRGN := gdk_region_new;
+  RegionObj := PGdkRegion(gdk_region_union_with_rect(RRGN,@R));
+  GObject^.GDIRegionObject := RegionObj;
+  gdk_region_destroy(RRGN);
   Result := HRGN({%H-}PtrUInt(GObject));
+
+//  GObject := NewGDIObject(gdiRegion);
+//  GObject^.GDIRegionObject := gdk_region_new;
+//  Result := HRGN({%H-}PtrUInt(GObject));
   //DebugLn('TGtk2WidgetSet.CreateEmptyRgn A RGN=',DbgS(Result));
 end;