On my homeroll install, I dont get any graphs in the cdr. The following is a list of the php modules that i have installed:
[root@asterisk ~]# rpm -qa | grep php
php-pdo-5.1.6-15.el5
php-mysql-5.1.6-15.el5
php-common-5.1.6-15.el5
php-cli-5.1.6-15.el5
php-ldap-5.1.6-15.el5
php-gd-5.1.6-15.el5
php-pear-1.4.9-4
php-5.1.6-15.el5
php5-jpgraph-2.1.2-1mdv2007.0