Been experimenting some more. I saw the post at:
http://ubuntuforums.org/showthread.php?t=1084622

The op there also was complaining about not booting without nolapic. But
that with nolacpic only 1 core works.

They linked to:
http://ubuntuforums.org/showthread.php?p=4890758
where they saw these boot options that worked for that user but not for them:
noapic nolapic pci=assign-busses apicmaintimer idle=poll reboot=cold,hard

However they were able to have some success by removing nolapic and just having 
it as:
noapic pci=assign-busses apicmaintimer idle=poll reboot=cold,hard

Those boot options worked for me too! But I continued experimenting. I
managed to remove everything except for idle=poll.

I understand though that this is a real power hog. But my laptop is
always plugged in so that’s not "too" bad. I will continue testing it to
see if there are any other issues with this option. If not I will
probably change my default boot options from nolapic to idle=poll.

I'll edit the title to reflect this new working boot option.

** Summary changed:

- Cannot boot/run ubuntu without acpi=off or nolapic. Freezes otherwise.
+ Cannot boot/run ubuntu without "acpi=off" or "nolapic" or "idle=poll". 
Freezes otherwise.

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https://bugs.launchpad.net/bugs/1336451

Title:
  Cannot boot/run ubuntu without "acpi=off" or "nolapic" or "idle=poll".
  Freezes otherwise.

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