3.11.0-4-generic #9-Ubuntu SMP is still freezing without any
identifiable pattern.  Sometimes it will lock up within minutes of
booting, other times it will go more than 10 hours.  It can happen when
a program is used, or it can happen when the machine is sitting idle and
unattended.  It can happen with just one or two apps open or with a
whole bunch.  I still can't find a way to force it to freeze on demand
other than to just wait it out.  As usual, the logs are blank on this.

Any suggestions from the kernel team or others on how to go about
collecting data?

Regards,
/Lars