Fixed: i have spyed how livegridview works and its weird because it fetch full page at each ajax updates, here is some code i experiment in page devices and values
controller DevicesController indexValuesAction
view devices/IndexValue
and testing if coming from livegridview just with the test of the ajax get value. it improve refresh a lot
If there are experts of Yii than can find a way to implement that in all controller and views without to have to change them all.....