Symfony 2.3.* authentication - symfony

Question

After testing clean install of Symfony 2.3 inside vagrant with Ubuntu 12.04.4 and 14.04 like this:
composer create-project symfony/framework-standard-edition login_not_working 2.3.*
update vendors:
composer install
edit app_dev.php like this, on first line after <?php for permissions:
umask(0000); // This will let the permissions be 0777
go to:
http://vagrant.dev/app_dev.php/
i click nice green button with RUN THE DEMO text and try to login with user/userpass or admin/adminpass. Symfony redirects me to:
http://vagrant.dev/app_dev.php/
and in the profiler i see very impressive message You are not authenticated. and with the extremly impressive red button too :D
This is just for testing and in actual application happens the same thing but on different setup... there i am using SonataUserBundle that extends FOSUserBundle...but it behaves the same...
I cleared cookies over, at least, 3 different browsers, clean cache with console and manually,...yada yada...
It smells like something with my vagrant box setup with/or/and a little flavor of permissions or maybe even sessions or ... boy is this kinky or what?
EDIT:
So, i uploaded both apps (clean test and my actual app with SonataUserBundle) to my VPS and both are workin' fine. Still, on few of my vagrant boxes authentication is not working?
And app/check.php output:
$ php app/check.php
OK PHP version must be at least 5.3.3 (5.5.12-2+deb.sury.org~precise+1 installed)
OK PHP version must not be 5.3.16 as Symfony wont work properly with it
OK Vendor libraries must be installed
OK app/cache/ directory must be writable
OK app/logs/ directory must be writable
OK date.timezone setting must be set
OK Configured default timezone "Europe/Berlin" must be supported by your installation of PHP
OK json_encode() must be available
OK session_start() must be available
OK ctype_alpha() must be available
OK token_get_all() must be available
OK simplexml_import_dom() must be available
OK detect_unicode must be disabled in php.ini
OK xdebug.show_exception_trace must be disabled in php.ini
OK xdebug.scream must be disabled in php.ini
OK PCRE extension must be available
** Optional recommendations **
OK xdebug.max_nesting_level should be above 100 in php.ini
OK Requirements file should be up-to-date
OK You should use at least PHP 5.3.4 due to PHP bug #52083 in earlier versions
OK When using annotations you should have at least PHP 5.3.8 due to PHP bug #55156
OK You should not use PHP 5.4.0 due to the PHP bug #61453
OK When using the logout handler from the Symfony Security Component, you should have at least PHP 5.4.11 due to PHP bug #63379 (as a workaround, you can also set invalidate_session to false in the security logout handler configuration)
OK You should use PHP 5.3.18+ or PHP 5.4.8+ to always get nice error messages for fatal errors in the development environment due to PHP bug #61767/#60909
OK PCRE extension should be at least version 8.0 (8.12 installed)
OK PHP-XML module should be installed
OK mb_strlen() should be available
OK iconv() should be available
OK utf8_decode() should be available
OK posix_isatty() should be available
OK intl extension should be available
OK intl extension should be correctly configured
OK intl ICU version should be at least 4+
OK a PHP accelerator should be installed
OK short_open_tag should be disabled in php.ini
OK magic_quotes_gpc should be disabled in php.ini
OK register_globals should be disabled in php.ini
OK session.auto_start should be disabled in php.ini
OK PDO should be installed
OK PDO should have some drivers installed (currently available: mysql, sqlite)

Answer 1

So, anyway, to answer my own question (kind of) and for the audience...thank you i'm fine... ;)
I configured Symfony to store sessions in memcached and that seems to resolve the problem (kind of). I'll test this on another machine/vagrant to confirm this :D
This "(kinf of)" is whole another story, but i'll leave that for another time :D
EDIT
I tested this on 2 more vagrant boxes and storing sessions to memcached resolve it :)