Bálint, have you tried IgnorantGuru's fix to /etc/udev/rules.d/70-persistent-cd.rules? What's the output you get if you type "cd /dev; ls -l scd* dvd* cd*"?
Bálint, have you tried IgnorantGuru's fix to /etc/udev/ rules.d/ 70-persistent- cd.rules? What's the output you get if you type "cd /dev; ls -l scd* dvd* cd*"?