package mysql-server-5.5 5.5.28-0ubuntu0.12.10.1 failed to reinstall

First mysql was not available. Therefor i tried to start/restart mysql:

- can't start mysql via: "sudo service mysql start" -> returns "start: Jobb failed to start"
- restart via "sudo service mysql restart" -> returns "stop: Unknown instance: start: Job failed to start"

Then I tried to reinstall mysql-server which failed because of an post installion script returned error code 1

ProblemType: Package
DistroRelease: Ubuntu 12.10
Package: mysql-server-5.5 5.5.28-0ubuntu0.12.10.1
ProcVersionSignature: Ubuntu 3.5.0-19.30-generic 3.5.7
Uname: Linux 3.5.0-19-generic x86_64
ApportVersion: 2.6.1-0ubuntu6
AptOrdering:
 mysql-server-5.5: Install
 mysql-server-5.5: Configure
Architecture: amd64
Date: Wed Nov 28 10:34:19 2012
ErrorMessage: Unterprozess installiertes post-installation-Skript gab den Fehlerwert 1 zurück
InstallationDate: Installed on 2012-10-20 (39 days ago)
InstallationMedia: Ubuntu 12.10 "Quantal Quetzal" - Release amd64 (20121017.5)
Logs.var.log.daemon.log:

Logs.var.log.mysql.error.log:
MarkForUpload: True
MySQLConf.etc.mysql.conf.d.mysqld.safe.syslog.cnf:
 [mysqld_safe]
 syslog
MySQLVarLibDirListing: ['kpmi', 'ibdata1', 'mysql', 'ib_logfile1', 'ib_logfile0', 'test', 'debian-5.5.flag', 'phpmyadmin', 'symfony', 'mysql_upgrade_info', 'performance_schema']
ProcCmdline: BOOT_IMAGE=/boot/vmlinuz-3.5.0-19-generic root=UUID=125a42a2-6a8e-4637-a578-a18ff6f61658 ro quiet splash vt.handoff=7
SourcePackage: mysql-5.5
Title: package mysql-server-5.5 5.5.28-0ubuntu0.12.10.1 failed to install/upgrade: Unterprozess installiertes post-installation-Skript gab den Fehlerwert 1 zurück
UpgradeStatus: No upgrade log present (probably fresh install)