I have never tried ppa:ondrej/php5, but I took a look at the deb and there is an upstart script (/etc/init/php5-fpm.conf) and an init.d script (/etc/init.d/php5-fpm). When both exist, calling service
gives precedence to the upstart script. One difference I noticed between the scripts is that the upstart script is using the --nodaemonize flag. The following command can be used to call the init.d script:
/etc/init.d/php5-fpm start
or
/etc/init.d/php5-fpm restart
If that works, then moving /etc/init/php5-fpm.conf out of /etc/init will cause the init.d script to have precedence.
Alternatively, fpm can be enabled when installing from source, by using the --enable-fpm option. http://www.php.net/manual/en/install.fpm.install.php