Comment 9 for bug 1167624

@epervieror

After looking at the sosreport output, it looks like you are one BIOS version behind :

Handle 0x0000, DMI type 0, 24 bytes
BIOS Information
        Vendor: Dell Inc.
        Version: A07
        Release Date: 01/22/2013

Here is the reference to the latest BIOS : http://goo.gl/iE1ep

This may not be a solution, but it might be better to upgrade to the latest BIOS before investigating any further