diff --git a/addons/base/controllers/main.py b/addons/base/controllers/main.py
index 1179eb37d42..d60ed63ac4f 100644
--- a/addons/base/controllers/main.py
+++ b/addons/base/controllers/main.py
@@ -526,12 +526,12 @@ class DataSet(openerpweb.Controller):
 class DataGroup(openerpweb.Controller):
     _cp_path = "/base/group"
     @openerpweb.jsonrequest
-    def read(self, request, model, group_by_fields, domain=None):
+    def read(self, request, model, fields, group_by_fields, domain=None):
         Model = request.session.model(model)
         context, domain = eval_context_and_domain(request.session, request.context, domain)
 
         return Model.read_group(
-            domain or [], False, group_by_fields, 0, False,
+            domain or [], fields, group_by_fields, 0, False,
             dict(context, group_by=group_by_fields))
 
 class View(openerpweb.Controller):
diff --git a/addons/base/static/src/js/data.js b/addons/base/static/src/js/data.js
index 1eb9c0f0a0d..534fd356f06 100644
--- a/addons/base/static/src/js/data.js
+++ b/addons/base/static/src/js/data.js
@@ -120,29 +120,25 @@ openerp.base.ContainerDataGroup = openerp.base.DataGroup.extend(
             aggregates: aggregates
         };
     },
-    fetch: function () {
+    fetch: function (fields) {
         // internal method
         var d = new $.Deferred();
         var self = this;
 
-        // disable caching for now, not sure what I should do there
-        if (false && this.groups) {
-            d.resolveWith(this, [this.groups]);
-        } else {
-            this.rpc('/base/group/read', {
-                model: this.model,
-                context: this.context,
-                domain: this.domain,
-                group_by_fields: this.group_by
-            }, function () { }).then(function (response) {
-                var data_groups = _(response).map(
-                        _.bind(self.transform_group, self));
-                self.groups = data_groups;
-                d.resolveWith(self, [data_groups]);
-            }, function () {
-                d.rejectWith.apply(d, self, [arguments]);
-            });
-        }
+        this.rpc('/base/group/read', {
+            model: this.model,
+            context: this.context,
+            domain: this.domain,
+            fields: _.uniq(this.group_by.concat(fields)),
+            group_by_fields: this.group_by
+        }, function () { }).then(function (response) {
+            var data_groups = _(response).map(
+                    _.bind(self.transform_group, self));
+            self.groups = data_groups;
+            d.resolveWith(self, [data_groups]);
+        }, function () {
+            d.rejectWith.apply(d, [self, arguments]);
+        });
         return d.promise();
     },
     /**
@@ -163,10 +159,14 @@ openerp.base.ContainerDataGroup = openerp.base.DataGroup.extend(
      *     records have for the current ``grouped_on`` field name).
      * ``aggregates``
      *     a mapping of other aggregation fields provided by ``read_group``
+     *
+     * @param {Array} fields the list of fields to aggregate in each group, can be empty
+     * @param {Function} ifGroups function executed if any group is found (DataGroup.group_by is non-null and non-empty), called with a (potentially empty) list of groups as parameters.
+     * @param {Function} ifRecords function executed if there is no grouping left to perform, called with a DataSet instance as parameter
      */
-    list: function (ifGroups, ifRecords) {
+    list: function (fields, ifGroups, ifRecords) {
         var self = this;
-        this.fetch().then(function (group_records) {
+        this.fetch(fields).then(function (group_records) {
             ifGroups(_(group_records).map(function (group) {
                 var child_context = _.extend({}, self.context, group.__context);
                 return _.extend(
@@ -195,7 +195,7 @@ openerp.base.GrouplessDataGroup = openerp.base.DataGroup.extend(
     init: function (session, model, domain, context, level) {
         this._super(session, model, domain, context, null, level);
     },
-    list: function (ifGroups, ifRecords) {
+    list: function (fields, ifGroups, ifRecords) {
         ifRecords(_.extend(
                 new openerp.base.DataSetSearch(this.session, this.model),
                 {domain: this.domain, context: this.context}));
@@ -215,7 +215,7 @@ openerp.base.StaticDataGroup = openerp.base.GrouplessDataGroup.extend(
     init: function (dataset) {
         this.dataset = dataset;
     },
-    list: function (ifGroups, ifRecords) {
+    list: function (fields, ifGroups, ifRecords) {
         ifRecords(this.dataset);
     }
 });
diff --git a/addons/base/static/src/js/list.js b/addons/base/static/src/js/list.js
index c4aea837a4f..60d9e3b552c 100644
--- a/addons/base/static/src/js/list.js
+++ b/addons/base/static/src/js/list.js
@@ -1074,18 +1074,23 @@ openerp.base.ListView.Groups = Class.extend( /** @lends openerp.base.ListView.Gr
         var self = this;
         var $element = $('<tbody>');
         this.elements = [$element[0]];
-        this.datagroup.list(function (groups) {
-            $element[0].appendChild(
-                self.render_groups(groups));
-            if (post_render) { post_render(); }
-        }, function (dataset) {
-            self.render_dataset(dataset).then(function (list) {
-                self.children[null] = list;
-                self.elements =
-                    [list.$current.replaceAll($element)[0]];
+
+        this.datagroup.list(
+            _(this.view.visible_columns).chain()
+                .filter(function (column) { return column.tag === 'field' })
+                .pluck('name').value(),
+            function (groups) {
+                $element[0].appendChild(
+                    self.render_groups(groups));
                 if (post_render) { post_render(); }
+            }, function (dataset) {
+                self.render_dataset(dataset).then(function (list) {
+                    self.children[null] = list;
+                    self.elements =
+                        [list.$current.replaceAll($element)[0]];
+                    if (post_render) { post_render(); }
+                });
             });
-        });
         return $element;
     },
     /**