I've tried to instal cacti via apt-get and from sources, and i get the same result - when viewing the graph - there is no images...
done few things :
chowning of rra and log folders, fixed crontab issue (crontab -u {apache user} instead of default seting user inside of crontab), configured snmp (auth,v3,publicdomain).
when I launch poller.php from console - it's ok, from crontab - ok too, timestamps on ls -l rra folder are updated, if i launch from console the graph statement from debug information ("rrdtool create" statement) i get the png image, some times with nan, but i get the image in my home folder ( rrdtool create > test.png). but from browser - i get nothing...
(cacti) logs does not contain any errors...
i don't know what to do next... ps. rebuilding rra cache doesn't solve the problem.
installed soft:
apache2
nginx
mysql
php5
rrdtool
snmp
net-snmp (from sources)
spine
php-snmp
php-gd
and more.. if need some specific information - I will provide it