diff --git a/lcl/interfaces/gtk3/gtk3object.inc b/lcl/interfaces/gtk3/gtk3object.inc
index 1b905cfc44..64fe5c6fb7 100644
--- a/lcl/interfaces/gtk3/gtk3object.inc
+++ b/lcl/interfaces/gtk3/gtk3object.inc
@@ -95,7 +95,7 @@ begin
   g_type_init;
   gtk_init(@argc, @argv);
   AGtkThread := g_thread_self();
-  AId := 'lcl.' + dbgHex(PtrUInt(AGtkThread));
+  AId := 'org.lcl.thread_' + dbgHex(PtrUInt(AGtkThread));
   FGtk3Application := TGtkApplication.new(PgChar(AId), G_APPLICATION_NON_UNIQUE);
   // FGtk3Application^.set_application_id(PgChar(AId));
   FGtk3Application^.register(nil, nil);
diff --git a/lcl/interfaces/gtk3/gtk3objects.pas b/lcl/interfaces/gtk3/gtk3objects.pas
index 7cfe89e43d..b17d242fe0 100644
--- a/lcl/interfaces/gtk3/gtk3objects.pas
+++ b/lcl/interfaces/gtk3/gtk3objects.pas
@@ -966,7 +966,7 @@ begin
   if FBkMode = TRANSPARENT then
   begin
     DebugLn('TGtk3DeviceContext.ApplyBrush setting transparent source');
-    cairo_set_source_surface(Widget, CairoSurface, 0 , 0);
+    //cairo_set_source_surface(Widget, CairoSurface, 0 , 0);
   end else
     SetSourceColor(FCurrentBrush.Color);
 end;
@@ -1552,13 +1552,14 @@ begin
   if ABrush <> 0 then
   begin
     ATempBrush := FCurrentBrush;
+    fBkMode:=OPAQUE;
     SetCurrentBrush(TGtk3Brush(ABrush));
   end;
 
   applyBrush;
   cairo_rectangle(Widget, x, y, w, h);
+  cairo_stroke_preserve(Widget);
   cairo_fill(Widget);
-  cairo_stroke(Widget);
   // cairo_clip(Widget);
 
   // cairo_fill_preserve(Widget);
diff --git a/lcl/interfaces/gtk3/gtk3widgets.pas b/lcl/interfaces/gtk3/gtk3widgets.pas
index 46ebe1365c..3f52c610f8 100644
--- a/lcl/interfaces/gtk3/gtk3widgets.pas
+++ b/lcl/interfaces/gtk3/gtk3widgets.pas
@@ -1665,9 +1665,10 @@ function TGtk3Widget.GtkEventPaint(Sender: PGtkWidget; AContext: Pcairo_t
   ): Boolean; cdecl;
 var
   Msg: TLMPaint;
-  AStruct: PPaintStruct;
+  AStruct: TPaintStruct;
   P: TPoint;
   AClipRect: TGdkRectangle;
+  localClip:TRect;
 begin
   Result := False;
 
@@ -1677,9 +1678,9 @@ begin
   FillChar(Msg, SizeOf(Msg), #0);
 
   Msg.Msg := LM_PAINT;
-  New(AStruct);
-  FillChar(AStruct^, SizeOf(TPaintStruct), 0);
-  Msg.PaintStruct := AStruct;
+  //New(AStruct);
+  FillChar(AStruct, SizeOf(TPaintStruct), 0);
+  Msg.PaintStruct := @AStruct;
 
   with PaintData do
   begin
@@ -1690,14 +1691,15 @@ begin
     ClipRegion := nil;
     // gdk_cairo_region(AContext, ClipRegion);
     // Event^.expose.region;
-    if ClipRect = nil then
-      New(ClipRect);
+    //if ClipRect = nil then
+    //  New(ClipRect);
     gdk_cairo_get_clip_rectangle(AContext, @AClipRect);
-    ClipRect^ := RectFromGdkRect(AClipRect);
+    localClip:=RectFromGdkRect(AClipRect);
+    ClipRect := @localClip;
   end;
 
   FCairoContext := AContext;
-  Msg.DC := BeginPaint(THandle(Self), AStruct^);
+  Msg.DC := BeginPaint(THandle(Self), AStruct);
   FContext := Msg.DC;
 
   Msg.PaintStruct^.rcPaint := PaintData.ClipRect^;
@@ -1743,11 +1745,11 @@ begin
       LCLObject.WindowProc(TLMessage(Msg));
     finally
       FCairoContext := nil;
-      Dispose(PaintData.ClipRect);
+      //Dispose(PaintData.ClipRect);
       Fillchar(FPaintData, SizeOf(FPaintData), 0);
       FContext := 0;
-      EndPaint(THandle(Self), AStruct^);
-      Dispose(AStruct);
+      EndPaint(THandle(Self), AStruct);
+      //Dispose(AStruct);
     end;
   except
     Application.HandleException(nil);
diff --git a/lcl/interfaces/gtk3/gtk3winapi.inc b/lcl/interfaces/gtk3/gtk3winapi.inc
index 6c742dca16..393aadd1bd 100644
--- a/lcl/interfaces/gtk3/gtk3winapi.inc
+++ b/lcl/interfaces/gtk3/gtk3winapi.inc
@@ -210,7 +210,7 @@ begin
         cairo_region_get_extents(RSrc1, @ACairoRect);
         TGtk3Region(Dest).Handle := cairo_region_create_rectangle(@ACairoRect);
         RDest := TGtk3Region(Dest).Handle;
-        cairo_region_translate(RDest, -ACairoRect.x, -ACairoRect.y);
+        //cairo_region_translate(RDest, -ACairoRect.x, -ACairoRect.y);
       end else
         AStatus := cairo_region_intersect(RDest, RSrc1);
     end;
@@ -1361,6 +1361,29 @@ begin
   Result := cairo_region_equal(TGtk3Region(Rgn1).Handle,TGtk3Region(Rgn2).Handle);
 end;
 
+function TGtk3WidgetSet.IntersectClipRect(dc: hdc; Left, Top, Right,Bottom: Integer): Integer;
+var
+  ncorg,dcOrigin:TPoint;
+  rgn,clip:HRGN;
+begin
+  {$IFDEF GTK3DEBUGNOTIMPLEMENTED}
+  DebugLn('WARNING: TGtk3WidgetSet.ExcludeClipRect not implemented ...');
+  {$ENDIF}
+  rgn:=Self.CreateRectRgn(Left,Top,Right,Bottom);
+  //Self.SelectClipRGN(dc,rgn);
+  clip:=Self.CreateEmptyRegion;
+  Self.GetClipRGN(dc,clip);
+  Self.CombineRgn(clip,rgn,clip,RGN_AND);
+  Self.SelectClipRGN(dc,clip);
+  DeleteObject(clip);
+  DeleteObject(rgn);
+  // fail Self.ExtSelectClipRGN(dc,rgn,RGN_AND);
+ { ncorg:=Tgtk3DeviceContext(dc).fncOrigin;
+  GetWindowOrgEx(DC, @DCOrigin);
+  Result:=inherited IntersectClipRect(dc, Left, Top, Right, Bottom);}
+end;
+
+
 function TGtk3WidgetSet.ExcludeClipRect(dc: hdc; Left, Top, Right,
   Bottom: Integer): Integer;
 begin
diff --git a/lcl/interfaces/gtk3/gtk3winapih.inc b/lcl/interfaces/gtk3/gtk3winapih.inc
index 0ec3895559..80d1e6f999 100644
--- a/lcl/interfaces/gtk3/gtk3winapih.inc
+++ b/lcl/interfaces/gtk3/gtk3winapih.inc
@@ -87,6 +87,7 @@ function EnumFontFamilies(DC: HDC; Family: Pchar; EnumFontFamProc: FontEnumProc;
 {$ENDIF}
 function EnumFontFamiliesEx({%H-}DC: HDC; lpLogFont: PLogFont; Callback: FontEnumExProc; Lparam: LParam; {%H-}Flags: dword): longint; override;
 function EqualRgn(Rgn1: HRGN; Rgn2: HRGN): Boolean; override;
+function IntersectClipRect(dc: hdc; Left, Top, Right,Bottom: Integer): Integer; override;
 function ExcludeClipRect(dc: hdc; Left, Top, Right, Bottom : Integer) : Integer; override;
 function ExtCreatePen(dwPenStyle, dwWidth: DWord; const lplb: TLogBrush; dwStyleCount: DWord; lpStyle: PDWord): HPEN; override;
 function ExtSelectClipRGN(dc: hdc; rgn : hrgn; Mode : Longint) : Integer;  override;