I needed some "configuration" for sending only my get/post vars to server without predefined variables: _search, nd, rows, page... with using JSON loadonce feature....

...and I found this solution:

grid.base.js

line 865: add

data2JSON : {},

line cca 1606: edit to

data: (ts.p.data2JSON) ? (ts.p.data2JSON) : ($.isFunction(ts.p.serializeGridData)? ts.p.serializeGridData.call(ts,ts.p.postData) : ts.p.postData),

this little update prevent sending predefined datas to server and send only my specific datas - same as $.ajax data method.

In my jqgrid works absolutely perfect, so i hope it help others.

😉