diff --git a/ide/lazarusidestrconsts.pas b/ide/lazarusidestrconsts.pas
index 2dae6d95f0..0e0c63c080 100644
--- a/ide/lazarusidestrconsts.pas
+++ b/ide/lazarusidestrconsts.pas
@@ -239,6 +239,8 @@ resourcestring
   lisConvert = 'Convert';
   lisPLDShowGlobalLinks = 'Show global links';
   lisPLDShowUserLinks = 'Show user links';
+  lrsPLDLpkFileValid = 'lpk file valid %s';
+  lrsPLDLpkFileInvalid = 'lpk file invalid %s';
   lisPLDGlobal = 'Global';
   lisCTDefDefineTemplates = 'Define templates';
   lisMenuCloseAll = 'Close A&ll';
diff --git a/packager/pkglinksdlg.lfm b/packager/pkglinksdlg.lfm
index 719338d91d..1dfe9abb4a 100644
--- a/packager/pkglinksdlg.lfm
+++ b/packager/pkglinksdlg.lfm
@@ -12,7 +12,7 @@ object PackageLinksDialog: TPackageLinksDialog
   LCLVersion = '1.1'
   object ScopeGroupBox: TGroupBox
     Left = 0
-    Height = 83
+    Height = 113
     Top = 0
     Width = 659
     Align = alTop
@@ -22,11 +22,12 @@ object PackageLinksDialog: TPackageLinksDialog
     ChildSizing.TopBottomSpacing = 6
     ChildSizing.HorizontalSpacing = 6
     ChildSizing.VerticalSpacing = 6
-    ChildSizing.Layout = cclLeftToRightThenTopToBottom
-    ClientHeight = 66
+    ClientHeight = 96
     ClientWidth = 655
     TabOrder = 0
     object ShowGlobalLinksCheckBox: TCheckBox
+      AnchorSideLeft.Control = ScopeGroupBox
+      AnchorSideTop.Control = ScopeGroupBox
       Left = 6
       Height = 24
       Top = 6
@@ -38,22 +39,55 @@ object PackageLinksDialog: TPackageLinksDialog
       TabOrder = 0
     end
     object ShowUserLinksCheckBox: TCheckBox
+      AnchorSideLeft.Control = ScopeGroupBox
+      AnchorSideTop.Control = ShowGlobalLinksCheckBox
+      AnchorSideTop.Side = asrBottom
       Left = 6
       Height = 24
       Top = 36
-      Width = 170
+      Width = 161
       Caption = 'ShowUserLinksCheckBox'
       Checked = True
       OnChange = ShowUserLinksCheckBoxChange
       State = cbChecked
       TabOrder = 1
     end
+    object LPKFileValidCheckBox: TCheckBox
+      AnchorSideLeft.Control = ScopeGroupBox
+      AnchorSideTop.Control = ShowUserLinksCheckBox
+      AnchorSideTop.Side = asrBottom
+      Left = 6
+      Height = 24
+      Top = 66
+      Width = 147
+      Caption = 'LPKFileValidCheckBox'
+      Checked = True
+      OnChange = LPKFileValidCheckBoxChange
+      State = cbChecked
+      TabOrder = 2
+    end
+    object LPKFileInvalidCheckBox: TCheckBox
+      AnchorSideLeft.Control = LPKFileValidCheckBox
+      AnchorSideLeft.Side = asrBottom
+      AnchorSideTop.Control = LPKFileValidCheckBox
+      AnchorSideTop.Side = asrCenter
+      Left = 168
+      Height = 24
+      Top = 66
+      Width = 155
+      BorderSpacing.Left = 15
+      Caption = 'LPKFileInvalidCheckBox'
+      Checked = True
+      OnChange = LPKFileInvalidCheckBoxChange
+      State = cbChecked
+      TabOrder = 3
+    end
   end
   object PkgStringGrid: TStringGrid
     AnchorSideBottom.Control = BtnPanel
     Left = 0
-    Height = 326
-    Top = 83
+    Height = 296
+    Top = 113
     Width = 659
     Align = alTop
     Anchors = [akTop, akLeft, akRight, akBottom]
diff --git a/packager/pkglinksdlg.pas b/packager/pkglinksdlg.pas
index 234f2e475a..d3d3afe4f5 100644
--- a/packager/pkglinksdlg.pas
+++ b/packager/pkglinksdlg.pas
@@ -48,13 +48,17 @@ type
 
   TPkgLinkInfo = class(TPackageLink)
   private
+    FIsValid: boolean;
     FLPKInfo: TLPKInfo;
+    FVisible: boolean;
   public
     constructor Create;
     destructor Destroy; override;
     procedure Assign(Source: TPersistent); override;
     property Origin;
     property LPKInfo: TLPKInfo read FLPKInfo;
+    property Visible: boolean read FVisible write FVisible;
+    property IsValid: boolean read FIsValid write FIsValid;
   end;
 
   { TPackageLinksDialog }
@@ -62,6 +66,8 @@ type
   TPackageLinksDialog = class(TForm)
     BtnPanel: TPanel;
     CloseBitBtn: TBitBtn;
+    LPKFileValidCheckBox: TCheckBox;
+    LPKFileInvalidCheckBox: TCheckBox;
     LPKParsingTimer: TTimer;
     ShowUserLinksCheckBox: TCheckBox;
     ShowGlobalLinksCheckBox: TCheckBox;
@@ -70,18 +76,25 @@ type
     UpdateGlobalLinksButton: TButton;
     procedure FormCreate(Sender: TObject);
     procedure FormDestroy(Sender: TObject);
+    procedure LPKFileValidCheckBoxChange(Sender: TObject);
+    procedure LPKFileInvalidCheckBoxChange(Sender: TObject);
     procedure LPKParsingTimerTimer(Sender: TObject);
     procedure OnAllLPKParsed(Sender: TObject);
     procedure ShowGlobalLinksCheckBoxChange(Sender: TObject);
     procedure ShowUserLinksCheckBoxChange(Sender: TObject);
     procedure UpdateGlobalLinksButtonClick(Sender: TObject);
   private
+    FCountLPKValid: integer;
+    FCountLPKInvalid: integer;
     FLinks: TAvglVLTree;// tree of TPkgLinkInfo sorted for names
     FCollectingOrigin: TPkgLinkOrigin;
+    procedure UpdateFacets;
     procedure UpdatePackageList;
     procedure ClearLinks;
     procedure IteratePackages(APackage: TLazPackageID);
   public
+    property CountLPKValid: integer read FCountLPKValid;
+    property CountLPKInvalid: integer read FCountLPKInvalid;
   end;
 
 function ShowPackageLinks: TModalResult;
@@ -108,10 +121,7 @@ procedure TPackageLinksDialog.FormCreate(Sender: TObject);
 begin
   Caption:=lisPLDPackageLinks;
   ScopeGroupBox.Caption:=dlgScope;
-  ShowGlobalLinksCheckBox.Caption:=lisPLDShowGlobalLinks
-                                 +' ('+PkgLinks.GetGlobalLinkDirectory+'*.lpl)';
-  ShowUserLinksCheckBox.Caption:=lisPLDShowUserLinks
-                                      +' ('+PkgLinks.GetUserLinkFile+')';
+  UpdateFacets;
   UpdateGlobalLinksButton.Caption:=lrsReadLplFiles;
   CloseBitBtn.Caption:=lisClose;
 
@@ -127,6 +137,16 @@ begin
   ClearLinks;
 end;
 
+procedure TPackageLinksDialog.LPKFileValidCheckBoxChange(Sender: TObject);
+begin
+  UpdatePackageList;
+end;
+
+procedure TPackageLinksDialog.LPKFileInvalidCheckBoxChange(Sender: TObject);
+begin
+  UpdatePackageList;
+end;
+
 procedure TPackageLinksDialog.LPKParsingTimerTimer(Sender: TObject);
 begin
   UpdatePackageList;
@@ -162,6 +182,7 @@ var
   i: Integer;
   OriginStr: String;
   Info: TLPKInfo;
+  NextNode: TAvgLvlTreeNode;
 begin
   // collect links
   ClearLinks;
@@ -180,13 +201,47 @@ begin
   // query additional information from lpk files
   LPKInfoCache.EnterCritSection;
   try
+    FCountLPKValid:=0;
+    FCountLPKInvalid:=0;
     Node:=FLinks.FindLowest;
     while Node<>nil do begin
       Link:=TPkgLinkInfo(Node.Data);
+      Link.Visible:=true;
+      NextNode:=Node.Successor;
       Info:=LPKInfoCache.FindPkgInfoWithFilename(Link.GetEffectiveFilename);
-      if Info<>nil then
-        Link.LPKInfo.Assign(Info);
-      Node:=Node.Successor;
+
+      // filter for Validity
+      if Link.Visible then begin
+        Link.IsValid:=true;
+        if Info<>nil then begin
+          Link.LPKInfo.Assign(Info);
+          if Link.LPKInfo.LPKParsed=lpkiParsedError then
+            Link.IsValid:=false;
+        end;
+        if Link.IsValid then begin
+          if not LPKFileValidCheckBox.Checked then Link.Visible:=false;
+        end else begin
+          if not LPKFileInvalidCheckBox.Checked then Link.Visible:=false;
+        end;
+      end;
+
+      if Link.Visible then begin
+        // todo filter for text
+
+      end;
+
+      if Link.Visible then begin
+        // this link is shown => increase facet counters
+        if Link.IsValid then
+          inc(FCountLPKValid)
+        else
+          inc(FCountLPKInvalid);
+      end else begin
+        // delete link
+        Link.Free;
+        FLinks.Delete(Node);
+      end;
+      Node:=NextNode;
     end;
   finally
     LPKInfoCache.LeaveCritSection;
@@ -205,6 +260,13 @@ begin
   Node:=FLinks.FindLowest;
   while Node<>nil do begin
     Link:=TPkgLinkInfo(Node.Data);
+    Node:=Node.Successor;
+
+    Info:=Link.LPKInfo;
+    if Info<>nil then begin
+
+    end;
+
     PkgStringGrid.Cells[0,i]:=Link.Name;
     PkgStringGrid.Cells[1,i]:=Link.Version.AsString;
     if Link.Origin=ploGlobal then
@@ -214,11 +276,24 @@ begin
     PkgStringGrid.Cells[2,i]:=OriginStr;
     PkgStringGrid.Cells[3,i]:=dbgs(FileExistsCached(Link.GetEffectiveFilename));
     PkgStringGrid.Cells[4,i]:=Link.GetEffectiveFilename;
+
     inc(i);
-    Node:=Node.Successor;
   end;
   
   PkgStringGrid.AutoAdjustColumns;
+  UpdateFacets;
+end;
+
+procedure TPackageLinksDialog.UpdateFacets;
+begin
+  ShowGlobalLinksCheckBox.Caption:=lisPLDShowGlobalLinks
+                                 +' ('+PkgLinks.GetGlobalLinkDirectory+'*.lpl)';
+  ShowUserLinksCheckBox.Caption:=lisPLDShowUserLinks
+                                      +' ('+PkgLinks.GetUserLinkFile+')';
+  LPKFileValidCheckBox.Caption:=Format(lrsPLDLpkFileValid, [IntToStr(
+    CountLPKValid)]);
+  LPKFileInvalidCheckBox.Caption:=Format(lrsPLDLpkFileInvalid, [IntToStr(
+    CountLPKInvalid)]);
 end;
 
 procedure TPackageLinksDialog.ClearLinks;