There's only one logfile under /var/log/mysql. Strangely it does/did not help to deinstall mysql and reinstall it after the update to 12.04.
Hope that helps ... ** Attachment added: "error.log" https://bugs.launchpad.net/ubuntu/+source/mysql-5.5/+bug/1013641/+attachment/3199266/+files/error.log ** Changed in: mysql-5.5 (Ubuntu) Status: Incomplete => New -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1013641 Title: package mysql-server-5.5 5.5.24-0ubuntu0.12.04.1 failed to install/upgrade: Unterprozess installiertes post-installation-Skript gab den Fehlerwert 1 zurück To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/mysql-5.5/+bug/1013641/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs