I had the same problem and I'd say the real bug here is that on upgrade the file /etc/apparmor.d/usr.sbin.mysqld was not updated to allow access to /run/mysql.[pid|sock] Reinstalling the mysql package simply replaced the old mysql apparmor profile with the new one that contains the correct path.
btw, ntp has the same problem. -- You received this bug notification because you are a member of Ubuntu Server Team, which is subscribed to mysql-5.1 in Ubuntu. https://bugs.launchpad.net/bugs/835715 Title: package mysql-server-5.1 5.1.54-1ubuntu4 failed to install/upgrade: subprocess installed post-installation script returned error exit status 100 To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/mysql-5.1/+bug/835715/+subscriptions -- Ubuntu-server-bugs mailing list [email protected] Modify settings or unsubscribe at: https://lists.ubuntu.com/mailman/listinfo/ubuntu-server-bugs
