What version of Phalcon are you using?
The latest version 2.0.8, it is strange the the psr3 is not printed in phpinfo
PHPINFO
phalcon
Web framework delivered as a C-extension for PHP
phalcon enabled
Author Phalcon Team and contributors
Version 2.0.8
Build Date Oct 8 2015 14:45:09
Powered by Zephir Version 0.8.0a
Directive Local Value Master Value
phalcon.db.escape_identifiers On On
phalcon.db.force_casting Off Off
phalcon.orm.cast_on_hydrate Off Off
phalcon.orm.column_renaming On On
phalcon.orm.enable_implicit_joins On On
phalcon.orm.enable_literals On On
phalcon.orm.events On On
phalcon.orm.exception_on_failed_save On On
phalcon.orm.ignore_unknown_columns Off Off
phalcon.orm.late_state_binding Off Off
phalcon.orm.not_null_validations On On
phalcon.orm.virtual_foreign_keys On On
phalcon.ini
extension=phalcon.so
; Enables/Disables globally the internal events
phalcon.orm.events = On
; Enables/Disables virtual foreign keys
phalcon.orm.virtual_foreign_keys = On
; Enables/Disables column renaming
phalcon.orm.column_renaming = On
; Enables/Disables automatic NOT NULL validation
phalcon.orm.not_null_validations = On
; Enables/Disables throwing an exception if save fails
phalcon.orm.exception_on_failed_save = On
; Enables/Disables literals in PHQL
phalcon.orm.enable_literals = On
; Enables/Disables auttomatic escape
phalcon.db.escape_identifiers = On
;psr3 logger interface
phalcon.register_psr3_classes = On;