Preventing PackageKit to lock yum

For more information on PackageKit, do take a look at their site.

PackageKit caused a yum lock by launching yumBackend.py and as a result you may not be able to do a yum install. Sometimes PackageKit is not the culprit but applications that uses it to update could be buggy and PackageKit is left with the "smoking gun". I think if you read the Red Hat Bugzilla – Bug 748790, you will some sense of thing.

But for me, I just want my yum to myself and control my own updates, you may want to edit PackageKit not to use yum as the backend

# vim /etc/PackageKit/PackageKit.conf

DefaultBackend=nobackend