diff --git a/addons/account/report/account_entries_report.py b/addons/account/report/account_entries_report.py
index 6060d97c182..df2d92c9f12 100644
--- a/addons/account/report/account_entries_report.py
+++ b/addons/account/report/account_entries_report.py
@@ -94,7 +94,7 @@ class account_entries_report(osv.osv):
         return super(account_entries_report, self).search(cr, uid, args=args, offset=offset, limit=limit, order=order,
             context=context, count=count)
 
-    def read_group(self, cr, uid, domain, fields, groupby, offset=0, limit=None, context=None, orderby=False):
+    def read_group(self, cr, uid, domain, fields, groupby, offset=0, limit=None, context=None, orderby=False,lazy=True):
         if context is None:
             context = {}
         fiscalyear_obj = self.pool.get('account.fiscalyear')
@@ -108,7 +108,7 @@ class account_entries_report(osv.osv):
             domain.append(['period_id','in',ids])
         else:
             domain = domain
-        return super(account_entries_report, self).read_group(cr, uid, domain, fields, groupby, offset, limit, context, orderby)
+        return super(account_entries_report, self).read_group(cr, uid, domain, fields, groupby, offset, limit, context, orderby,lazy)
 
     def init(self, cr):
         tools.drop_view_if_exists(cr, 'account_entries_report')
diff --git a/addons/calendar/calendar.py b/addons/calendar/calendar.py
index e928432821b..add0030d76c 100644
--- a/addons/calendar/calendar.py
+++ b/addons/calendar/calendar.py
@@ -1476,7 +1476,7 @@ class calendar_event(osv.Model):
         self.create_attendees(cr, uid, [res], context=context)
         return res
 
-    def read_group(self, cr, uid, domain, fields, groupby, offset=0, limit=None, context=None, orderby=False):
+    def read_group(self, cr, uid, domain, fields, groupby, offset=0, limit=None, context=None, orderby=False, lazy=True):
         if not context:
             context = {}
 
@@ -1484,7 +1484,7 @@ class calendar_event(osv.Model):
             raise osv.except_osv(_('Warning!'), _('Group by date is not supported, use the calendar view instead.'))
         virtual_id = context.get('virtual_id', True)
         context.update({'virtual_id': False})
-        res = super(calendar_event, self).read_group(cr, uid, domain, fields, groupby, offset=offset, limit=limit, context=context, orderby=orderby)
+        res = super(calendar_event, self).read_group(cr, uid, domain, fields, groupby, offset=offset, limit=limit, context=context, orderby=orderby, lazy=lazy)
         for result in res:
             #remove the count, since the value is not consistent with the result of the search when expand the group
             for groupname in groupby:
diff --git a/addons/idea/models/idea.py b/addons/idea/models/idea.py
index 61934cfc3b2..37fbbe82e1c 100644
--- a/addons/idea/models/idea.py
+++ b/addons/idea/models/idea.py
@@ -91,7 +91,7 @@ class IdeaIdea(osv.Model):
     # Technical stuff
     #------------------------------------------------------
 
-    def read_group(self, cr, uid, domain, fields, groupby, offset=0, limit=None, context=None, orderby=False):
+    def read_group(self, cr, uid, domain, fields, groupby, offset=0, limit=None, context=None, orderby=False, lazy=True):
         """ Override read_group to always display all states. """
         if groupby and groupby[0] == "state":
             # Default result structure
@@ -103,7 +103,7 @@ class IdeaIdea(osv.Model):
                         'state_count': 0,
                     } for state_value, state_name in states]
             # Get standard results
-            read_group_res = super(IdeaIdea, self).read_group(cr, uid, domain, fields, groupby, offset, limit, context, orderby)
+            read_group_res = super(IdeaIdea, self).read_group(cr, uid, domain, fields, groupby, offset, limit, context, orderby, lazy)
             # Update standard results with default results
             result = []
             for state_value, state_name in states:
@@ -114,7 +114,7 @@ class IdeaIdea(osv.Model):
                 result.append(res[0])
             return result
         else:
-            return super(IdeaIdea, self).read_group(cr, uid, domain, fields, groupby, offset=offset, limit=limit, context=context, orderby=orderby)
+            return super(IdeaIdea, self).read_group(cr, uid, domain, fields, groupby, offset=offset, limit=limit, context=context, orderby=orderby, lazy=lazy)
 
     #------------------------------------------------------
     # Workflow / Actions
diff --git a/addons/note/note.py b/addons/note/note.py
index 7f03f43b36a..38b2395a852 100644
--- a/addons/note/note.py
+++ b/addons/note/note.py
@@ -116,7 +116,7 @@ class note_note(osv.osv):
     }
     _order = 'sequence'
 
-    def read_group(self, cr, uid, domain, fields, groupby, offset=0, limit=None, context=None, orderby=False):
+    def read_group(self, cr, uid, domain, fields, groupby, offset=0, limit=None, context=None, orderby=False, lazy=True):
         if groupby and groupby[0]=="stage_id":
 
             #search all stages
@@ -169,7 +169,7 @@ class note_note(osv.osv):
 
         else:
             return super(note_note, self).read_group(self, cr, uid, domain, fields, groupby, 
-                offset=offset, limit=limit, context=context, orderby=orderby)
+                offset=offset, limit=limit, context=context, orderby=orderby,lazy=lazy)
 
 
 #upgrade config setting page to configure pad, fancy and tags mode