dbus-daemon consumes 100% cpu after login

[Maximilian Federle]

In my up-to-date quantal system there appears to be a "dbus-daemon" process by the user "lightdm" that consumes 100% cpu. I have encountered this bug a few times, it is not easily reproducible though.

Exemplary top output:

 PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ COMMAND
 1390 lightdm 20 0 23808 1632 1308 R 100,1 0,1 6:20.49 dbus-daemon

ProblemType: Bug
DistroRelease: Ubuntu 12.10
Package: lightdm 1.4.0-0ubuntu1
ProcVersionSignature: Ubuntu 3.5.0-17.27-generic 3.5.5
Uname: Linux 3.5.0-17-generic x86_64
ApportVersion: 2.6.1-0ubuntu1
Architecture: amd64
Date: Sun Oct 7 00:46:09 2012
InstallationMedia: Ubuntu 12.10 "Quantal Quetzal" - Alpha amd64+mac (20120905.2)
ProcEnviron:
 TERM=xterm
 PATH=(custom, no user)
 XDG_RUNTIME_DIR=<set>
 LANG=de_DE.UTF-8
 SHELL=/bin/bash
SourcePackage: lightdm
UpgradeStatus: No upgrade log present (probably fresh install)

[Launchpad Janitor (janitor)]

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