Relevant last lines in the log: Aborting downgrade from (at least) 5.6 to 5.5. If are sure you want to downgrade to 5.5, remove the file /var/lib/mysql/debian-*.flag and try installing again.
Try removing MySQL 5.6 first before you install MariaDB, otherwise the install will abort on this downgrade warning. Any all official releases of Ubuntu that include MySQL 5.6 has MariaDB 10.0 so I don't see why you anyway try to install MariaDB 5.5 after 5.6 when you should have 10.0 available. ** Summary changed: - package mariadb-server-5.5 (not installed) failed to install/upgrade: új pre-installation szkript alfolyamat 1 hibakóddal kilépett + package mariadb-server-5.5 automatically aborts downgrading but users don't read the dpkg terminal output to see this -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1439326 Title: package mariadb-server-5.5 automatically aborts downgrading but users don't read the dpkg terminal output to see this To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/mariadb-5.5/+bug/1439326/+subscriptions -- ubuntu-bugs mailing list [email protected] https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
