FC5T3 hang at 'Starting udev'

[John Reiser]

> Trying to install FC5T3 on my Vaio SZ140 (very newish laptop from Sony).
>  The install went fine, but upon reboot, the machine hangs a few seconds
> after the 'Starting udev' message.

Put "set -x" at the beginning of /sbin/start_udev [use a rescue mode CD-ROM];
boot and see where it hangs.  Later in the same script, trace the system
calls of /sbin/udevstart:  "strace /sbin/udevstart".

I have different hardware with the same symptom.  The cause seems to be
related to USB probing, and began somewhere around kernel-2.6.15:
   https://bugzilla.redhat.com/bugzilla/show_bug.cgi?id=179601
I am nearing the end of a "git bisect" search to find the kernel bug.

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