JBossDeveloper

Issue resolved.  Here is the fix:

standalone.xml

<datasources>

<!-- Start PostgresSQL datasource definitions using our deployed module -->

                    <datasource jta="false" jndi-name="java:/datasources/name" pool-name="pool-name" enabled="true" use-ccm="false">

                         <connection-url>url</connection-url>

                         <driver-class>org.postgresql.Driver</driver-class>

                         <driver>postgresql</driver>

                         <pool>

                            <min-pool-size>5</min-pool-size>

                            <max-pool-size>10</max-pool-size>

                            <prefill>false</prefill>

                         </pool>

                         <security>

                             <user-name>user</user-name>

                             <password>passwd</password>

                         </security>

                         <validation>

                             <validate-on-match>false</validate-on-match>

                             <background-validation>false</background-validation>

                             <check-valid-connection-sql>SELECT current_timestamp</check-valid-connection-sql>

                        </validation>

                        <statement>

                            <share-prepared-statements>false</share-prepared-statements>

                        </statement>

                    </datasource>

<!-- Add custom driver modules -->

    <!--Example: <driver name="postgresql-jdbc4" module="org.postgresql"/> -->

                  <drivers>

                     <driver name="postgresql" module="org.postgresql">

                       <xa-datasource-class>org.postgresql.xa.PGXADataSource</xa-datasource-class>

                </driver>

     <!-- End custom driver modules -->

                    <!--driver name="h2" module="com.h2database.h2">

                        <xa-datasource-class>org.h2.jdbcx.JdbcDataSource</xa-datasource-class>

                    </driver-->

                </drivers>

/modules/org/postgresql/main contents

     module.xml

<?xml version="1.0" encoding="UTF-8"?>

<!--

  ~ JBoss, Home of Professional Open Source.

  ~ Copyright 2010, Red Hat, Inc., and individual contributors

  ~ as indicated by the @author tags. See the copyright.txt file in the

  ~ distribution for a full listing of individual contributors.

  ~

  ~ This is free software; you can redistribute it and/or modify it

  ~ under the terms of the GNU Lesser General Public License as

  ~ published by the Free Software Foundation; either version 2.1 of

  ~ the License, or (at your option) any later version.

  ~

  ~ This software is distributed in the hope that it will be useful,

  ~ but WITHOUT ANY WARRANTY; without even the implied warranty of

  ~ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU

  ~ Lesser General Public License for more details.

  ~

  ~ You should have received a copy of the GNU Lesser General Public

  ~ License along with this software; if not, write to the Free

  ~ Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA

  ~ 02110-1301 USA, or see the FSF site: http://www.fsf.org.

  -->

<module xmlns="urn:jboss:module:1.0" name="org.postgresql">

  <resources>

    <resource-root path="postgresql-9.1-902.jdbc4.jar"/>

  </resources>

  <dependencies>

    <module name="javax.api"/>

  </dependencies>

</module>

     postgresql-9.1.902.jdbc4.jar.index

org/postgresql/jdbc2

org/postgresql/jdbc3g

org/postgresql/ds/jdbc4

org/postgresql/ssl

org/postgresql/xa

org/postgresql/jdbc2/optional

org

org/postgresql/jdbc4

org/postgresql/ds

org/postgresql/jdbc3

org/postgresql/copy

org/postgresql/util

org/postgresql/gss

org/postgresql/translation

org/postgresql

org/postgresql/ds/jdbc23

META-INF

org/postgresql/core/types

org/postgresql/geometric

org/postgresql/core

org/postgresql/core/v2

org/postgresql/ds/common

org/postgresql/core/v3

META-INF/services

org/postgresql/largeobject

org/postgresql/fastpath

Postgresql JDBC4 driver from:

http://jdbc.postgresql.org/download/postgresql-9.1-902.jdbc4.jar

Tested and working.  If you are sure to include this:

enabled="true"

in your config.xml definition you wont have to enable the driver manually after the AS server starts.