Control: tags -1 moreinfo Hello!
What does 'find /etc/mysql -ls' show for you? Maybe the original problem is that you edited the wrong configuration file and it was lost on upgrade? Due how mysql-common works in Debian, the /etc/mysql/my.cnf is not a real file but a symlink to the real config, and most of the config is in the /etc/mysql/mariadb.cnf.d/* directory anyway.