Unable to connect to the system bus: Failed to connect to socket /var/run/dbus/system_bus_socket: Connection refused (2) - although symlinks are right

[magelan]

I get this error message when shutting down: "Unable to connect to the system bus: Failed to connect to socket /var/run/dbus/system_bus_socket: Connection refused". The system shows a dialog where I can chose to change to a root shell and other options. I open a new bug because Steve Langasek (vorlon) wrote here that it is another reason: https://bugs.launchpad.net/ubuntu/+source/sysvinit/+bug/858122/comments/42.
---
ApportVersion: 1.23-0ubuntu3
Architecture: i386
DistroRelease: Ubuntu 11.10
InstallationMedia: Ubuntu 10.04 LTS "Lucid Lynx" - Release i386 (20100427.1)
NonfreeKernelModules: wl fglrx
Package: dbus 1.4.14-1ubuntu1
PackageArchitecture: i386
ProcEnviron:
 PATH=(custom, user)
 LANG=de_DE.UTF-8
 SHELL=/bin/bash
ProcVersionSignature: Ubuntu 3.0.0-12.20-generic-pae 3.0.4
Tags: oneiric running-unity
Uname: Linux 3.0.0-12-generic-pae i686
UpgradeStatus: Upgraded to oneiric on 2011-10-19 (16 days ago)
UserGroups: adm admin audio cdrom dialout dip fax floppy fuse lpadmin netdev plugdev powerdev sambashare tape video
---
ApportVersion: 1.23-0ubuntu3
Architecture: i386
DistroRelease: Ubuntu 11.10
InstallationMedia: Ubuntu 10.04 LTS "Lucid Lynx" - Release i386 (20100427.1)
NonfreeKernelModules: wl fglrx
Package: dbus 1.4.14-1ubuntu1
PackageArchitecture: i386
ProcEnviron:
 PATH=(custom, user)
 LANG=de_DE.UTF-8
 SHELL=/bin/bash
ProcVersionSignature: Ubuntu 3.0.0-12.20-generic-pae 3.0.4
Tags: oneiric running-unity
Uname: Linux 3.0.0-12-generic-pae i686
UpgradeStatus: Upgraded to oneiric on 2011-10-19 (16 days ago)
UserGroups: adm admin audio cdrom dialout dip fax floppy fuse lpadmin netdev plugdev powerdev sambashare tape video
---
ApportVersion: 1.23-0ubuntu3
Architecture: i386
DistroRelease: Ubuntu 11.10
InstallationMedia: Ubuntu 10.04 LTS "Lucid Lynx" - Release i386 (20100427.1)
NonfreeKernelModules: wl fglrx
Package: dbus 1.4.14-1ubuntu1
PackageArchitecture: i386
ProcEnviron:
 PATH=(custom, user)
 LANG=de_DE.UTF-8
 SHELL=/bin/bash
ProcVersionSignature: Ubuntu 3.0.0-12.20-generic-pae 3.0.4
Tags: oneiric running-unity
Uname: Linux 3.0.0-12-generic-pae i686
UpgradeStatus: Upgraded to oneiric on 2011-10-19 (16 days ago)
UserGroups: adm admin audio cdrom dialout dip fax floppy fuse lpadmin netdev plugdev powerdev sambashare tape video

[magelan (magelan)]

apport information

[magelan (magelan)]

apport information

[magelan (magelan)]

I am sorry, I/apport have send the additional information three times.
I get this bug when using "sudo shutdown now" from the terminal.
It existed in ubuntu 11.04 as well.

[Launchpad Janitor (janitor)]

Status changed to 'Confirmed' because the bug affects multiple users.

[Peter Nagy (antronin)]

It affect me too. Actually it happens if I switched between users during uptime. Once I try to shutdown this message show. An additional issue is that I can switch between user normally, but if I have 2 users logged in and I log out with the actual one I can log in to the other but the desktop will never load in.
Please let me know what logs should I send and how to find/produce them to help bugfixing.

[dino99 (9d9)]

Oneiric have reached EOL since a while now, and is no more maintained.