Chuck Ebbert wrote:
> It is the standard Fedora script "iptables" and it recursively
> unloads all referring modules, then the base ones: ip_tables and
> ip_conntrack. I can't tell which module it stopped on because
> that computer is at home today. 
> 
> And yes, it really locks up until it's caught by the softlockup
> watchdog. Has only happened on a uniprocessor i686 system so far,
> but happens every time on shutdown.


Can you try this patch please?