Hi everyone.
The "BIOS issue" discussed in mailing list some time ago ( http://lists.fedoraproject.org/pipermail/devel/2012-March/164814.html), probably was caused by *biosdevname*. I can't be sure at 100% but since i removed it (due of Bug801885https://bugzilla.redhat.com/show_bug.cgi?id=801885), that problem is disappeared.
What do you think ?
Regards.