Your log had "2015-07-06 12:55:05 27747 [ERROR] /usr/sbin/mysqld: unknown variable 'log_slow_queries=/var/log/mysql/mysql-slow.log'" so I presume this was a custom configuration change that no longer works after the upgrade to 5.6? Marking this bug as Invalid then. If I'm mistaken, please explain and reopen.
Your log had "2015-07-06 12:55:05 27747 [ERROR] /usr/sbin/mysqld: unknown variable 'log_slow_ queries= /var/log/ mysql/mysql- slow.log' " so I presume this was a custom configuration change that no longer works after the upgrade to 5.6? Marking this bug as Invalid then. If I'm mistaken, please explain and reopen.