diff --git a/addons/crm/crm_meeting_view.xml b/addons/crm/crm_meeting_view.xml
index 3f04bd0edeb..527f5814be4 100644
--- a/addons/crm/crm_meeting_view.xml
+++ b/addons/crm/crm_meeting_view.xml
@@ -264,11 +264,7 @@
         <field name="model">crm.meeting</field>
         <field name="type">gantt</field>
         <field name="arch" type="xml">
-            <gantt color="user_id" date_delay="duration" date_start="date" string="Meetings">
-               <level object="crm.meeting" link="id" domain="[]">
-                   <field name="name"/>
-                   <field name="partner_id"/>
-                </level>
+            <gantt date_delay="duration" date_start="date" string="Meetings">
             </gantt>
         </field>
     </record>
diff --git a/addons/mrp/mrp_view.xml b/addons/mrp/mrp_view.xml
index ab647aca8fd..806195850d7 100644
--- a/addons/mrp/mrp_view.xml
+++ b/addons/mrp/mrp_view.xml
@@ -604,11 +604,7 @@
             <field name="model">mrp.production</field>
             <field name="type">gantt</field>
             <field name="arch" type="xml">
-                <gantt color="product_id" date_stop="date_finished" date_start="date_start" string="Productions">
-                    <level object="mrp.routing" link="routing_id" domain="[]">
-                        <field name="name"/>
-                        <field name="origin"/>
-                    </level>
+                <gantt date_stop="date_finished" date_start="date_start" string="Productions" default_group_by="routing_id">
                 </gantt>
             </field>
         </record>
diff --git a/addons/mrp_operations/mrp_operations_view.xml b/addons/mrp_operations/mrp_operations_view.xml
index e7decebbf4b..c40b9611fb5 100644
--- a/addons/mrp_operations/mrp_operations_view.xml
+++ b/addons/mrp_operations/mrp_operations_view.xml
@@ -177,12 +177,7 @@
         <field name="model">mrp.production.workcenter.line</field>
         <field name="type">gantt</field>
         <field name="arch" type="xml">
-            <gantt color="workcenter_id" date_delay="hour" date_start="date_planned" string="Operations">
-                <level object="mrp.workcenter" link="production_id" domain="[]">
-                    <field name="product"/>
-                    <field name="hour"/>
-                    <field name="production_id"/>
-                </level>
+            <gantt date_delay="hour" date_start="date_planned" string="Operations" default_group_by="production_id">
             </gantt>
         </field>
     </record>
@@ -216,12 +211,7 @@
         <field name="model">mrp.production.workcenter.line</field>
         <field name="type">gantt</field>
         <field name="arch" type="xml">
-            <gantt color="production_id" date_delay="hour" date_start="date_planned">
-                <level object="mrp.workcenter" link="workcenter_id" domain="[]">
-                    <field name="product"/>
-                    <field name="hour"/>
-                    <field name="production_id"/>
-                </level>
+            <gantt date_delay="hour" date_start="date_planned" default_group_by="workcenter_id">
             </gantt>
         </field>
     </record>
diff --git a/addons/project/project_view.xml b/addons/project/project_view.xml
index b8bc0635e04..26abe86fe99 100644
--- a/addons/project/project_view.xml
+++ b/addons/project/project_view.xml
@@ -160,10 +160,7 @@
             <field name="model">project.project</field>
             <field name="type">gantt</field>
             <field name="arch" type="xml">
-                <gantt color="user_id" date_delay="planned_hours" date_start="date_start" string="Projects">
-                    <level object="project.project" link="id" domain="[]">
-                        <field name="complete_name"/>
-                    </level>
+                <gantt date_delay="planned_hours" date_start="date_start" string="Projects">
                 </gantt>
             </field>
         </record>
@@ -463,7 +460,7 @@
             <field name="type">gantt</field>
             <field eval="2" name="priority"/>
             <field name="arch" type="xml">
-                <gantt color="user_id" date_start="date_start" date_stop="date_end" string="Tasks" default_group_by="project_id,user_id">
+                <gantt date_start="date_start" date_stop="date_end" string="Tasks" default_group_by="project_id">
                 </gantt>
             </field>
         </record>
diff --git a/addons/project_long_term/project_long_term_view.xml b/addons/project_long_term/project_long_term_view.xml
index 37a9e8f154b..23ae8139bea 100644
--- a/addons/project_long_term/project_long_term_view.xml
+++ b/addons/project_long_term/project_long_term_view.xml
@@ -13,10 +13,7 @@
             <field name="model">project.user.allocation</field>
             <field name="type">gantt</field>
             <field name="arch" type="xml">
-              <gantt color="project_id" date_start="date_start" date_stop="date_end" mode="year">
-               <level object="res.users" link="user_id" domain="[]">
-                    <field name="phase_id"/>
-                </level>
+              <gantt date_start="date_start" date_stop="date_end" default_group_by="user_id">
               </gantt>
             </field>
         </record>
@@ -215,10 +212,7 @@
             <field name="type">gantt</field>
             <field eval="2" name="priority"/>
             <field name="arch" type="xml">
-                <gantt color="project_id" date_stop="date_end" date_start="date_start" mode="month">
-                    <level object="project.project" link="project_id" domain="[]">
-                        <field name="name"/>
-                    </level>
+                <gantt date_stop="date_end" date_start="date_start" default_group_by="project_id">
                 </gantt>
             </field>
         </record>