package mysql-server-5.5 5.5.22-0ubuntu1 failed to install/upgrade: subprocess installed post-installation script returned error exit status 1

[Risto Mononen]

Seems to conflict with mariadb installation, need mysql for freeDiameter.

ProblemType: Package
DistroRelease: Ubuntu 12.04
Package: mysql-server-5.5 5.5.22-0ubuntu1
ProcVersionSignature: Ubuntu 3.2.0-23.36-generic 3.2.14
Uname: Linux 3.2.0-23-generic i686
ApportVersion: 2.0.1-0ubuntu4
Architecture: i386
Date: Mon Apr 16 22:14:38 2012
ErrorMessage: subprocess installed post-installation script returned error exit status 1
InstallationMedia: Ubuntu 11.10 "Oneiric Ocelot" - Release i386 (20111012)
Logs.var.log.daemon.log:

MySQLConf.etc.mysql.conf.d.mysqld.safe.syslog.cnf:
 [mysqld_safe]
 syslog
MySQLVarLibDirListing: ['aria_log.00000001', 'ib_logfile1', 'client_test_db', 'ibdata1', 'test', 'performance_schema', 'paja.pid', 'ib_logfile0', 'aria_log_control', 'ocs_emu', 'debian-5.5.flag', 'debian-5.1.flag', 'mysql_upgrade_info', 'mysql']
SourcePackage: mysql-5.5
Title: package mysql-server-5.5 5.5.22-0ubuntu1 failed to install/upgrade: subprocess installed post-installation script returned error exit status 1
UpgradeStatus: Upgraded to precise on 2012-03-31 (18 days ago)