h:selectOneListBox not working - jsf

Question

I have a simple JSF application with a form, one of the controls being a selectOneListbox:
<h:selectOneListbox style="width: 231px; height: 27px;position:absolute;left:400px;top:325px;" value="#{PatientsSearch.selectedDoctor}">
<f:selectItems value="#{PatientsSearch.doctors}" var="d" itemLabel="#{d.name}" itemValue="#{d.name}" />
</h:selectOneListbox>
When I run the application, I can see the list being populated (i.e. PatientsSearch.doctors is correctly retrieved), so I can choose one item from the selectOneListbox. After I choose the desired item, nothing works any more on that form. All the other buttons seem to be idle, they don't react to clicks any more. If however nothing is selected from the selectOneListbox, all buttons works as expected (i.e. they trigger their callbacks in the managed beans).
I debugged the application and noticed that indeed, after selecting an item in the list, the callbacks of the other buttons on the form don't get triggered when clicking them.
Also in the debugger I never see setSelectedDoctor() being called (see the snippet above) as I expected.
I'm using Mojarra 2.0.1 implementation of JSF.
What am I missing here ?
Update: This is the entire form:
<h:form style="width: 876px; background-color: #FED981; padding-left: 60px; padding-top: 30px; margin-left: 80px; margin-top: 40px; color: #804000; font-style: normal; font-family: Verdana, Arial, Sans-Serif">
<h:outputLabel style="position:absolute;left:200px;top:100px;" value="New appointment:"></h:outputLabel>
<br>
<br>
<h:inputText style="width: 259px;position:absolute;left:200px;top:120px;" binding="#{PatientsSearch.inputText1}" valueChangeListener="#{PatientsSearch.lookForName}" immediate="true" id="inputText1" />
<h:commandButton value ="Search patients by name:" style="width: 173px;position:absolute;left:465px;top:120px;" action="#{PatientsSearch.getPatientsByName}">
<f:param name="day" value="#{request.getParameter('day')}" />
<f:param name="month" value="#{request.getParameter('month')}" />
<f:param name="year" value="#{request.getParameter('year')}" />
</h:commandButton>
<br>
<h:panelGroup id="pn_DETAILS_GRP" style="overflow:auto;position:absolute;top:155px;left:200px;width:300px;height:150px;solid black">
<h:dataTable id="tb_USER_DETAILS" border="1" var="patient" value="#{PatientsSearch.patients}" style="width:300px;height:150px" rowClasses="oddRow, evenRow">
<h:column id="name">
<f:facet name="header">
<h:outputText value="Name" style="font-size:10pt"/>
</f:facet>
<h:outputText value="#{patient.name}" style="font-size:8pt"/>
</h:column>
<h:column id="phone">
<f:facet name="header">
<h:outputText value="Phone" style="font-size:10pt"/>
</f:facet>
<h:outputText value="#{patient.phoneMobile}" style="font-size:8pt"/>
</h:column>
<h:column>
<h:inputHidden id="patientId" value="#{patient.id}" />
</h:column>
</h:dataTable>
</h:panelGroup>
<h:inputHidden id="testId" />
<br><br><br>
<h:outputLabel value="Choose doctor:" style="width: 200px;position:absolute;left:200px;top:325px;"></h:outputLabel>
<h:selectOneListbox style="width: 231px; height: 27px;position:absolute;left:400px;top:325px;" value="#{PatientsSearch.selectedDoctor}" size="1">
<f:selectItems value="#{PatientsSearch.doctors}" var="d"
itemLabel="#{d.name}" itemValue="#{d.name}" />
</h:selectOneListbox>
<br><br><br>
<h:commandButton value="Schedule" style="position:absolute;left:200px;top:430px;" action="#{PatientsSearch.scheduleAppointment}">
<f:param name="day" value="#{request.getParameter('day')}" />
<f:param name="month" value="#{request.getParameter('month')}" />
<f:param name="year" value="#{request.getParameter('year')}" />
</h:commandButton>
</h:form>

Answer 1

As per comments, the problem is that the type for #{d.name} is not the same as #{PatientsSearch.selectedDoctor}. In such situation there is two solutions :
Keep everything you have the same, change the #{PatientsSearch.selectedDoctor} getter/setter to a String type.
Create a list of SelectItem in the backing bean and change the #{PatientsSearch.selectedDoctor} getter/setter to a String type. You will also be able to remove itemValue and itemLabel since the backing bean already provide ready Object for list components.
Change the itemValue attribute from the f:selectItems and create a custom converter
I prefer the second since it separate better the view. It should be changed like this :
<h:selectOneListbox style="width: 231px; height: 27px;position:absolute;left:400px;top:325px;" value="#{PatientsSearch.selectedDoctor}" size="1">
<f:selectItems value="#{PatientsSearch.doctors}" var="d" itemLabel="#{d.name}" />
<f:converter convertId="doctorConverter" />
</h:selectOneListbox>
Now for the converter, you can start it like this :
#FacesConverter(value="doctorConverter")
public class DoctorConverter implements Converter {
#Override
public Object getAsObject(FacesContext context, UIComponent component, String value) {
// Your code, select doctor from value ID for example.
}
#Override
public String getAsString(FacesContext context, UIComponent component, Object value) {
// Your code, return doctor ID from value.
}
}