selectOneMenu ajax events

Question

I am using an editable primefaces selectOneMenu to display some values. If the user selects an item from the List a textarea should be updated. However, if the user types so

Answer 1

Be carefull that the page does not contain any empty component which has "required" attribute as "true" before your selectOneMenu component running.
If you use a component such as

then,

and forget to fill the required component, ajax listener of selectoneMenu cannot be executed.