Thanks Howard;
phpinfo showed that Session was not enabled, a spin through the distribution showed that the mod_session was not loaded. Installed that and voila!
Installing and upgrading help
Fatal error: Call to undefined function: session_name() in /srv/www/htdocs/moodle/lib/setup.php on line 201
Eztabaida hau blokeatu da eta beraz aurrerantzean ezingo duzu bertan erantzun.