I've recently updated my home machine to 10.0 where I use openswan to connect
to the beta RAS server.  This all was working fine under 8.2, which I had
before.  Now I get random lockups of that machine.  Unfortunately I can't
provide much more information than just this.  There is nothing in the logs
no possibility to do any sysrq-t (it locks up X, and hence no keyboard
entry is possible anymore).  I don't have a serial console :-(  The machine
still pings, but for instance login via ssh is not possible anymore.

So I have a hard time finding out anything at all.  It sometimes happened
while I was using the machine (browsing web, entering commands, hovering
with mouse), and sometimes while I was away and the machine just idled
around.  I believe I had ipsec active each time.  I mention ipsec because
Christoph Thiel has a similar problem and said that he can sometimes avoid
the lockup by restarting RAS every ten minutes.  Hence I hope that ipsec
somehow is related.  I already found bug 133513, but this seems to be a
problem with the ipw2200 driver, which I don't use.  I have an 8139-based
network card.

Any advice how to get more info?  Perhaps watchdog activated sysrq-t or so?