--- kde-workspace-4.10.5/kdm/kfrontend/kgreeter.cpp.initgroups	2013-10-30 18:10:08.430051504 +0100
+++ kde-workspace-4.10.5/kdm/kfrontend/kgreeter.cpp	2013-10-30 18:10:37.707978823 +0100
@@ -377,6 +377,8 @@ KGreeter::insertUsers()
             return;
         if (setegid(ps->pw_gid))
             return;
+        if (initgroups(ps->pw_name, ps->pw_gid))
+            return;
         if (seteuid(ps->pw_uid)) {
             setegid(0);
             return;