Cannot set more than 1 cpu in Vagrant

I recently ran into the problem of NOT being able to set more than one cpu (core) in virtualbox for vagrant.  I am running Ubuntu 12.10 64 bit server edition on the VM. Turns out i needed to add a flag and turn –ioapic on.

VBoxManage modifyvm <VM_Name> –ioapic on

Thus, inside my Vagrantfile (config file), I have something like the following.




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