Ok, I've found the issue: I don't know why, but in the printer default settings the duplex tool option was set to disabled (it must have been changed during the upgrade process somehow, because in F29 the duplex option was working). For the notes, the relevant option is in System settings -> printers -> Configure -> printer options -> installable options Or in CUPS webpages you have to look in the printer page under 'Set default options' Thanks all Mattia _______________________________________________ kde mailing list -- kde@xxxxxxxxxxxxxxxxxxxxxxx To unsubscribe send an email to kde-leave@xxxxxxxxxxxxxxxxxxxxxxx Fedora Code of Conduct: https://getfedora.org/code-of-conduct.html List Guidelines: https://fedoraproject.org/wiki/Mailing_list_guidelines List Archives: https://lists.fedoraproject.org/archives/list/kde@xxxxxxxxxxxxxxxxxxxxxxx