Somebody in the thread at some point said:
I am sure there is something not quite right with my computer.
But
for sure with the old kernel it DID WORK.
The problem seems to have been tracked down in the meanwhile --
apparently it is not the kernel at fault but udev. Update udev like this:
yum --enablerepo=updates-testing update udev
and see if that resolves the problem for you.
-Andy