[Bug 876268] [NEW] Mysqld does not start: Bind on unix socket: Permission denied

[Manolinux]

Public bug reported:

I updated to oneiric and mysqld does not start. It seems it can't create
the socket /var/run/mysqld/mysqld.sock

What the log /var/log/mysql/error.log says:

===

11017  9:44:12 [Note] Plugin 'FEDERATED' is disabled.
111017  9:44:12  InnoDB: Initializing buffer pool, size = 8.0M
111017  9:44:12  InnoDB: Completed initialization of buffer pool
111017  9:44:12  InnoDB: Started; log sequence number 0 363147242
111017  9:44:12 [ERROR] Can't start server : Bind on unix socket: Permission denied
111017  9:44:12 [ERROR] Do you already have another mysqld server running on socket: /var/run/mysqld/mysqld.sock ?
111017  9:44:12 [ERROR] Aborting

===

But, I have the appropiate permisions:

===
$ ls -la /var/run/mysqld
total 0
drwxr-xr-x  2 mysql root   40 2011-10-17 09:29 .
drwxr-xr-x 31 root  root 1040 2011-10-17 09:17 ..

===

And I checked mysqld runs as the appropiate user:

===
mysql    12938     1  2 09:33 ?        00:00:00 /usr/sbin/mysqld
===

Trying mysql_safe:

===
$ sudo mysqld_safe 
[sudo] password for manolinux: 
111017 09:49:26 mysqld_safe Logging to syslog.
111017 09:49:26 mysqld_safe Starting mysqld daemon with databases from /var/lib/mysql
111017 09:49:32 mysqld_safe mysqld from pid file /var/lib/mysql/min.pid ended
===

ProblemType: Bug
DistroRelease: Ubuntu 11.10
Package: mysql-server-5.1 5.1.58-1ubuntu1
ProcVersionSignature: Ubuntu 3.0.0-12.20-generic 3.0.4
Uname: Linux 3.0.0-12-generic x86_64
ApportVersion: 1.23-0ubuntu3
Architecture: amd64
Date: Mon Oct 17 09:38:02 2011
ProcEnviron:
 LANGUAGE=es_ES:en_US:en
 PATH=(custom, user)
 LANG=es_ES.UTF-8
 LC_MESSAGES=es_ES.UTF-8
 SHELL=/bin/bash
SourcePackage: mysql-5.1
UpgradeStatus: Upgraded to oneiric on 2011-10-14 (2 days ago)
mtime.conffile..etc.apparmor.d.usr.sbin.mysqld: 2010-12-27T16:46:29

** Affects: mysql-5.1 (Ubuntu)
     Importance: Undecided
         Status: New


** Tags: amd64 apport-bug oneiric

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Title:
  Mysqld does not start: Bind on unix socket: Permission denied

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