Well, I found the problem.
Problem was the disable_funtions in php.ini
BUT nginx doesn't write nothing in the error.log.
I'm trying to figure out why a 500 code in nginx isn't writed. Default log level is error. After this issue I changed the error log level to debug but ... nothing!
However I don't know if this issue is nginx or fpm related
Last edited by pititis; 30th January 2013 at 11:00.