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That's odd about the core count. I only get that behavior if my host system only has 1 CPU to begin with (tested in qemu/KVM with nesting). Could you comment on your host system parameters a bit?

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This is definitively not expected. You could also try setting the CPU/Mem configuration via VBoxManage. Maybe you get a good error message then.

`VBoxManage modifyvm <vm_name> --cpus <number of cpus>`

`VBoxManage modifyvm <vm_name> --memory <amout of memory in MB>`

User error, I had to discard the snapshot state first - just like in normal vbox ;)

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